Free Online Tools

Convert JSON arrays to CSV and CSV to JSON instantly in your browser. Download CSV files with one click.

Check foreground and background color contrast against WCAG 2.1 AA and AAA accessibility standards.

Calculate TikTok engagement rate, like rate, comment rate, and share rate from your video stats.

Estimate staking rewards with compounding, validator fees, and multiple time periods for any crypto token.

Calculate return on investment, ROAS, CPM, CPC, and engagement metrics for influencer marketing campaigns.

Calculate required margin, pip value, and position size for forex trades with customizable leverage.

Estimate your annual carbon footprint from driving, flights, electricity, gas, and diet, and calculate the cost to offset it.

Generate creative business name ideas based on your keywords, industry, and preferred naming style.

Generate ready-to-read podcast intro and outro scripts based on your show name, topic, and tone.

Calculate your cryptocurrency trading profit or loss, ROI, fees paid, and breakeven price.

Design custom YouTube thumbnails at 1280×720 with text overlay, custom backgrounds, and instant PNG download.

Estimate your take-home pay after federal tax, state tax, and FICA deductions for any pay frequency.

Generate trending hashtags for Instagram, TikTok, and X based on your topic and niche.

Convert SVG files to high-quality PNG images with custom dimensions and retina scaling, all in your browser.

Compare the total cost of renting versus buying a home over time, including taxes, appreciation, and opportunity cost.

Generate a free privacy policy template for your website with GDPR, CCPA, and COPPA compliance options.

Generate a free terms of service template for your website, SaaS, or e-commerce business.

Plan your debt-free journey using avalanche or snowball strategy with extra payment optimization.

Free online scientific calculator with trigonometry, logarithms, powers, factorials, and calculation history.

Convert PNG images to JPG format with adjustable quality and background color. Everything runs in your browser.

Add, subtract, multiply, and divide fractions and mixed numbers with step-by-step solutions.

Crop images online with preset aspect ratios or custom dimensions. Download the cropped result as PNG.

Generate engaging Instagram captions with hooks, body text, and calls to action in multiple moods and styles.

Format your LinkedIn posts with bold, italic, and special Unicode styling, separators, and emoji bullets.

Convert PNG images to ICO favicon format with multiple size options. Download a ready-to-use favicon.ico file.

Perform matrix operations including addition, subtraction, multiplication, determinant, inverse, and transpose.

Calculate your weekly work hours and pay with clock-in/out times, break deductions, and overtime tracking.

Convert between Bitcoin (BTC), satoshis, mBTC, and USD. Fetch live prices or enter custom values.

Calculate your ideal freelance hourly rate based on desired income, expenses, taxes, and billable hours.

Generate high-converting email subject lines optimized for open rates. Choose from multiple styles.

Convert XML to JSON instantly in your browser. Handles nested elements, attributes, and arrays.

Generate professional email templates for welcome, follow-up, cold outreach, meetings, and more.

Add customizable text watermarks to your images. Control font, opacity, position, and tiling.

Build markdown tables visually with a spreadsheet-like editor. Set alignment and export clean markdown.

Calculate Compound Annual Growth Rate with year-by-year breakdown and total return metrics.

Generate catchy bios for Instagram, Twitter, LinkedIn, TikTok, and YouTube with customizable tones.

Transform text into creepy, glitchy Zalgo text using Unicode combining characters. Control intensity and direction.

Preview how your page looks on social media and generate Open Graph and Twitter Card meta tags.

Discover unique baby names filtered by gender, origin, starting letter, and style from a curated database.

Perform arithmetic and bitwise operations on binary, decimal, octal, and hexadecimal numbers.

Calculate monthly savings needed to reach your goal, with interest projections and growth timeline.

Calculate IPv4 subnet details including network, broadcast, host range, and binary breakdown.

Test JSONPath expressions against JSON data. Supports dot notation, arrays, slicing, and wildcards.

Pick colors from an interactive wheel and explore complementary, analogous, triadic, and split-complementary harmonies.

Plan your wedding budget with category breakdowns, per-guest costs, and a custom spending tracker.

Convert between px, em, and rem CSS units. Set custom root and parent font sizes with a reference table.

Create gradient borders with live preview and generated CSS code. Customize colors, width, radius, and angle.

Calculate PPI/DPI, dot pitch, total pixels, and physical dimensions for any screen resolution and size.

Visual flexbox layout builder. Configure direction, alignment, wrapping, and gap — copy the CSS.

Calculate daily protein, carbs, and fat targets based on your stats, activity level, and fitness goals.

Estimate body fat percentage using the U.S. Navy method with waist, neck, and hip measurements.

Create CSS keyframe animations with presets and custom keyframes. Live preview and copy-ready code.

Plan retirement savings with compound growth projections, the 4% rule, and gap analysis.

Convert HTML to clean Markdown. Handles headings, links, images, lists, code blocks, and tables.

Generate monthly calendars for any year. Navigate months, highlight today, and print directly.

Estimate US federal income tax with 2025 brackets, standard deduction, and bracket breakdown.

Convert curl commands to JavaScript, Python, PHP, Go, and Ruby code instantly.

Calculate your daily water intake based on weight, activity level, and climate with a drinking schedule.

Apply filters and adjustments to your photos — brightness, contrast, saturation, blur, and presets like sepia and vintage.

Estimate your blood alcohol content using the Widmark formula based on drinks, weight, gender, and time.

Convert images to Base64 encoded strings. Output as data URI, raw base64, CSS, HTML, or Markdown.

Calculate your love compatibility score with your partner using a fun name-based algorithm.

View EXIF metadata from your photos — camera model, exposure, focal length, ISO, and more. All processed locally.

Calculate and compare CSS selector specificity. Understand which styles win in the cascade.

Estimate reading time, speaking time, word count, and readability score for any text or article.

Calculate your Life Path, Expression, Soul Urge, and Personality numbers from your name and birth date.

Analyze word frequency in any text. View counts, percentages, and visual bars with stop word filtering and CSV export.

Decode binary, octal, hexadecimal, or decimal values to text and encode text back. Supports all common number bases.

Generate stylish Unicode text in 17+ styles — bold, italic, gothic, script, circled, squared, upside down, and more.

Customizable HIIT interval timer with work/rest periods, rounds, prep countdown, and audio beeps.

Create, study, and flip flashcards. Add cards manually or import from CSV. Track known vs unknown cards.

Convert JSON objects to TypeScript interfaces automatically. Supports nested objects, arrays, optional, and readonly modifiers.

Compare electric vehicle vs gas car costs over time. Calculate fuel savings, cost per mile, and total ownership cost.

Convert text to ASCII art in multiple font styles — block, banner, shadow, and small caps.

Get random creative writing prompts across 8 genres — fantasy, sci-fi, romance, horror, mystery, literary, humor, and thriller.

Calculate your Total Daily Energy Expenditure based on age, gender, weight, height, and activity level using the Mifflin-St Jeor equation.

Build Tailwind CSS classes visually. Adjust spacing, typography, colors, borders, and shadows — see generated classes and HTML instantly.

Generate JSON-LD structured data for SEO. Support for Article, FAQ, LocalBusiness, Product, HowTo, Event, Organization, and more.

Build UTM-tagged URLs for campaign tracking. Add source, medium, campaign, term, and content parameters with link history.

Calculate running pace, time, or distance. Includes presets for 5K, 10K, half marathon, and marathon with split times.

Solve ax² + bx + c = 0. Get real or complex roots, discriminant, vertex, axis of symmetry, step-by-step solution, and graph.

Estimate your fertile window and ovulation date based on menstrual cycle length. Includes 3-cycle forecast and timeline.

Generate fluid CSS clamp() values for responsive typography and spacing. Set min/max viewport and values with live preview.

Calculate stock trading profit or loss including commissions, fees, and capital gains tax. See total return and break-even price.

Estimate your one-rep max (1RM) using 7 proven formulas. Get percentage-based training loads for any lift.

Calculate your DTI ratio to assess financial health and mortgage eligibility. See your rating on the lender scale.

Calculate gross, operating, and net profit margins. Enter revenue and costs to see margins, markup, and visual breakdown.

Generate Nginx server configurations for reverse proxy, static sites, PHP, and redirects with SSL, gzip, and security headers.

Generate production-ready Dockerfiles for Node.js, Python, Go, Java, Rust, and static sites with multi-stage builds.

Split a restaurant bill among friends. Add tip percentage, tax, and see what each person owes with tip comparison.

Calculate mean, variance, standard deviation, median, mode, and range. Supports population and sample calculations with steps.

Create Open Graph preview images for social media sharing. Customize title, colors, template, and download as PNG (1200×630).

Generate JSON Web Tokens for testing. Set header, payload, and secret key. Uses HMAC-SHA256 with Web Crypto API.

Generate a single strong password with entropy feedback and one-click copy.

Generate one or many random passwords with custom length, character sets, strength feedback, and copy controls.

Count words, characters, sentences and paragraphs in your text instantly.

Format, beautify and validate JSON data with syntax highlighting.

Create QR codes for text and URLs instantly, preview them online, and download the image in one click.

Encode text to Base64 or decode Base64 back into readable UTF-8 text directly in your browser.

Generate one or many UUID v4 values instantly with copy controls and case options.

Convert colors between HEX, RGB, and HSL with a live swatch preview and quick copy actions.

Generate customizable lorem ipsum placeholder text by paragraph count and word length in seconds.

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text instantly in your browser.

Convert Unix timestamps to readable dates and convert dates back to epoch seconds or milliseconds.

Encode or decode URL components and full URLs with percent-encoding tools that run entirely in your browser.

Convert text between uppercase, lowercase, title case, camelCase, snake_case, kebab-case, and more instantly.

Convert text into uppercase, lowercase, title case, camelCase, snake_case, kebab-case, and more with live counts.

Test regex patterns with live match highlighting, capture groups, flags, and reusable developer snippets.

Compare two text blocks line by line and review added, removed, and unchanged lines in a clear diff view.

Convert Markdown into clean HTML with live source output and rendered preview in your browser.

Encode special characters as HTML entities or decode entity strings back into readable text instantly.

Generate Mandelbrot and Julia set fractals with zoom controls, color themes, and PNG download right in your browser.

Create harmonious five-color palettes from any base color using complementary, analogous, triadic, and other color theory rules.

Format book, journal article, website, and video citations in MLA 9 or APA 7 style instantly.

Resize images with exact dimensions, lock aspect ratio, preview the canvas result, and download PNG or JPEG output in your browser.

Estimate your due date, gestational age, trimester, conception date, and pregnancy progress from your LMP.

See how inflation changes future buying power with year-by-year projections and a visual purchasing power chart.

Convert uploaded images into plain text or colored ASCII art directly in your browser.

Convert temperatures between Celsius, Fahrenheit, and Kelvin with live updates and helpful reference formulas.

Switch between a lap-enabled stopwatch and a countdown timer with presets and a browser-generated alarm.

Generate creative username ideas for social accounts, gamertags, and brand-new handles in one click.

Create memorable XKCD-style passphrases with adjustable word counts, separators, and strength estimates.

Estimate monthly mortgage costs, total interest, total cost, escrow add-ons, and first-year amortization while comparing 15-year and 30-year loans.

Use the classic four-card percentage calculator for percentage-of, reverse percentage, and change calculations.

Solve percentage-of, reverse percentage, and percent change problems instantly with quick-pick shortcuts.

Convert common units across length, weight, temperature, volume, area, speed, time, and data categories.

Calculate body mass index in metric or imperial units with the original classic layout.

Calculate BMI in metric or imperial units and see the matching category on a visual scale.

Calculate exact age, total days lived, next birthday countdown, zodiac details, and more from a birth date.

Calculate tip amount, total bill, and per-person totals with quick 10, 15, 18, 20, and 25 percent presets.

Find sale prices after one or more stacked discounts, calculate total savings, and optionally apply sales tax.

Enter width and height to simplify a ratio, then use presets or one known dimension to calculate the other side.

Detect your current screen size, browser window dimensions, DPR, color depth, orientation, and retina status.

Check your public IP address, IPv4 or IPv6 availability, and location details such as city, ISP, and timezone.

Convert UTF-8 text to binary and binary back to text while also viewing hex, octal, and decimal byte values.

Convert Arabic numbers to Roman numerals and validate Roman numeral input from I to MMMCMXCIX.

Convert numbers between binary, octal, decimal, hexadecimal, and custom bases up to base 36.

Minify CSS for production or beautify stylesheets into a readable format directly in your browser.

Beautify messy JavaScript snippets or minify them into a compact one-line version with adjustable indentation.

Parse five-field cron schedules into human-readable text, explore presets, and preview the next execution times.

Decode JWT headers and payloads, inspect token claims, and review signature bytes without sending data anywhere.

Convert YAML to JSON or turn JSON back into YAML with inline validation for common configuration structures.

Format SQL queries into readable clauses, uppercase keywords, or minify statements for compact output.

Search common HTTP response codes, filter by category, and expand each status for details and practical use cases.

Convert Unix file permissions between numeric and symbolic forms while generating a ready-to-copy chmod command.

Calculate DeepSeek API costs for V4-Flash and V4-Pro models. Includes cache hit/miss pricing, thinking mode, and current promotional discounts.

Generate smooth, natural 'butter' prompts for ChatGPT that produce human-like, conversational AI responses. A viral prompt engineering technique.

Create prompts that make ChatGPT generate text-based sketches, diagrams, ASCII art, and visual representations of concepts and processes.

Compare AI coding assistants side-by-side: Antigravity, Claude Code, Cursor, GitHub Copilot, and more. Features, pricing, model support, and use cases.

Compare API pricing across GPT-5.5, Claude Opus 4.7, Gemini 3.5 Flash, Qwen 3.7, Composer 2.5, and DeepSeek V4. Calculate costs for any usage level.

Compare AI model performance across standard benchmarks: MMLU, HumanEval, MATH, GPQA, and more. Interactive charts for GPT-5.5, Claude Opus 4.7, Gemini 3.5, Qwen 3.7.

Pick any two AI models and compare them side-by-side: pricing, benchmarks, features, speed, and best use cases. Composer 2.5 vs Opus 4.7, GPT-5.5 vs Claude, and more.

Check if your cover letter is the right length. Get word count, character count, and expert guidance on ideal cover letter length for different industries.

Estimate token counts for GPT, Claude, Gemini, DeepSeek, and other AI models. See cost estimates and tokenization rules of thumb.

Generate creative brand names for your business, clothing line, tech startup, or any industry. Multiple styles from minimal to luxury.

Create professional HTML email signatures for Gmail, Outlook, and Apple Mail. Multiple styles with live preview and one-click copy.

Generate professional GitHub README.md files with badges, installation steps, API reference, and more. Copy-paste ready markdown.

Calculate your GPA on 4.0, 4.3, or 5.0 scales. Add courses with grades and credits to see cumulative GPA and Latin honors classification.

Calculate your weighted course grade with custom assignment weights. Find out what score you need on remaining work to hit your target.

Create beautiful CSS gradients with a visual editor. Choose linear or radial gradients, pick colors, adjust angles, and copy the CSS code instantly.

Design perfect CSS box-shadow effects with a visual editor. Adjust offset, blur, spread, color, and inset to create shadows and copy ready-to-use CSS.

Calculate how much your appliances cost to run. Enter wattage, usage hours, and electricity rate to see daily, monthly, and yearly power costs.

Calculate the exact number of days, weeks, months, and years between two dates. Includes weekday count, detailed breakdown, and add/subtract days tool.

Calculate the real cost of meetings based on attendees, duration, and hourly rates. See per-minute costs, annual impact, and use the live meeting timer.

Validate JSON data against a JSON Schema. Check types, required fields, patterns, min/max constraints, and nested objects with detailed error messages.

Generate professional pay stubs with earnings, deductions, taxes, and net pay. Customize employee info, tax rates, 401k, and health insurance. Print-ready format.

Find perfect Google Fonts combinations with live preview. Choose heading and body fonts, adjust sizes, and copy ready-to-use CSS. Includes 8 curated presets.

Build clean invoices with line items, tax, notes, live totals, and a print-ready browser preview.

Create favicons from text, emoji, or uploaded images. Generate all sizes (16x16 to 512x512) including Apple Touch Icon. Download as PNG with HTML code snippet.

Calculate return on investment with annualized ROI, break-even period, and gain multiple. Compare your returns against S&P 500, real estate, and bonds benchmarks.

Compress images in your browser with adjustable quality. Supports PNG, JPG, and WebP output. Resize images and see before/after comparison with file size savings.

Run a customizable 25 minute work and 5 minute break cycle with a progress ring, Web Audio beep, and completed pomodoro tracking.

Estimate monthly loan payments, total interest, amortization, and a principal-versus-interest breakdown.

Generate Code 128, Code 39, and EAN barcodes from any text or numbers. Customize bar width, height, colors, and download as PNG or copy to clipboard.

Create pixel art with a grid-based drawing canvas. Features draw, erase, and fill tools, 10-color palette, mirror mode, and PNG export at multiple scales.

Play white noise, pink noise, brown noise, rain, fan, and ocean wave sounds for focus, sleep, and relaxation. Adjustable volume and sleep timer included.

Translate English to Pig Latin and back. Handles consonant clusters, preserves capitalization and punctuation. Perfect for fun wordplay and language learning.

Extract a color palette from any uploaded image using K-means clustering. Get dominant colors as HEX and RGB values with CSS variable code ready to copy.

A drag-and-drop Kanban board for task management. Create columns, add cards, edit in-place, and organize your workflow. No login required, runs entirely in browser.

Create flowcharts with drag-and-drop nodes. Add processes, decisions, and I/O shapes. Connect nodes with arrows, export as PNG, or generate Mermaid code.

Convert text to spoken audio using your browser built-in speech synthesis. Choose from available voices, adjust speed, pitch, and volume. No data sent to servers.

Create beautiful countdown timers to any date. Set presets for holidays, events, or custom dates. Share countdown links with others.

Calculate optimal bedtime or wake-up time based on 90-minute sleep cycles. Get personalized recommendations for better sleep quality.

Calculate your daily calorie needs (TDEE) based on age, weight, height, and activity level. Get macro nutrient breakdowns for your fitness goals.

Visual CSS Grid layout builder. Adjust columns, rows, gaps, and alignment with live preview. Export clean CSS code for your projects.

Visual border-radius editor with live preview. Adjust each corner independently or link them together. Export CSS with one click.

Generate SEO-optimized meta tags for your website. Includes Open Graph, Twitter Card, and basic meta tags with Google preview.

Browse, search, and copy emojis by category. Build emoji collections, view Unicode info, and access recently used emojis.

Generate random numbers, pick from lists, create secure passwords, and generate UUIDs. Supports ranges, decimals, and unique values.

Roll virtual dice of any type (D4, D6, D8, D10, D12, D20, D100). Add modifiers, roll multiple dice, and track roll history with statistics.

Flip a virtual coin with realistic animation. Track heads vs tails statistics, streaks, and flip history. Support multi-coin flips.

Measure your typing speed (WPM) and accuracy with timed tests. Choose 30s, 60s, or 2-minute tests. Track your improvement over sessions.

Scramble words and letters in text, or play the anagram unscramble game. Great for word games, puzzles, and brain training.

Create stunning text shadow effects with multiple layers. Use presets like Neon, Retro, 3D, Fire, and Emboss. Copy CSS with one click.

Generate XML sitemaps from a list of URLs. Configure priority, change frequency, and lastmod dates. Download or copy the sitemap XML.

Simulate how colors appear to people with different types of color vision deficiency. Test color contrast for accessibility compliance.

Record your screen or webcam directly in the browser. Choose quality settings, include audio, and download recordings as WebM files.

Convert text to Morse code and back. Play Morse code as audio beeps. Full reference chart included.

Repeat any text multiple times with custom separators. Add line numbers, choose delimiters, and copy the result.

Mix two colors together with adjustable ratios. See RGB and HSL values, blended result, and complementary colors.

Create beautiful gradient text effects with CSS. Pick colors, angle, and font size. Copy the CSS code for your website.

Track your monthly budget with income and expense items. See totals, balance, and category breakdown at a glance.

Calculate compound interest with customizable principal, rate, time, and compounding frequency. View year-by-year growth breakdown.

Track daily habits with a weekly grid. Mark completions, see progress percentages. Data saved locally in your browser.

Simple task manager with priorities, categories, and status filters. Add, edit, complete, and delete tasks. Saved in your browser.

Interactive regular expression reference with categories. Click to copy patterns. Includes a live regex tester for your patterns.

Searchable Git command reference organized by category. Copy commands with one click. Covers basics, branching, remote, stash, and more.

Comprehensive HTTP header guide organized by type. Request, response, security, and caching headers with descriptions and examples.

Complete DNS record type guide with descriptions and examples. Learn about A, AAAA, CNAME, MX, NS, TXT, SOA, SRV, and PTR records.

Visual cron expression builder with dropdowns for each field. See next run times and human-readable descriptions. Includes common presets.

Build docker run commands visually. Configure ports, volumes, environment variables, and more. Includes presets for popular images.

Send HTTP requests to APIs directly from your browser. Set method, headers, and body. View response status, headers, and JSON body.

Build webhook payloads for Slack, Discord, GitHub, and Stripe. Generate curl commands. Preview JSON payloads with common templates.

Create and edit SVG shapes visually. Add circles, rectangles, lines, and text. Set colors and positions. Export SVG code.

Generate text-based icons with custom letters, emojis, colors, and shapes. Download as PNG in multiple sizes using Canvas API.

Generate random organic blob shapes as SVG. Control complexity, size, and color. Copy SVG code or CSS clip-path for your designs.

Generate CSS background patterns: stripes, dots, checkerboard, zigzag, and more. Customize colors and spacing. Copy CSS code.

Calculate harmonious font size scales. Choose ratios like Golden Ratio, Perfect Fourth, or Major Third. Export CSS custom properties.

Create frosted glass CSS effects with adjustable blur, transparency, and border. Live preview on colorful backgrounds. Copy CSS code.

Generate soft UI (neumorphic) design effects. Adjust shape, distance, blur, and intensity. Choose flat, concave, convex, or pressed styles.

Create multi-point mesh gradients with radial gradient layers. Add color stops, adjust positions. Copy CSS for beautiful backgrounds.

Upload an image, add classic top and bottom meme captions, preview the result on canvas, and download a PNG.

Upload an existing QR code, recolor it, add an optional logo and poster text, then export a styled PNG.

Match any hex value to the closest named CSS color and browse all 148 standard CSS color names.

Analyze an existing password for entropy, crack time, character variety, common patterns, and improvement tips.

Place a screenshot inside minimalist iPhone, iPad, MacBook, or browser frames and download the mockup as PNG.

Turn typed text into a handwriting-style canvas rendering with natural jitter, connecting strokes, and PNG export.

Generate layered SVG wave dividers with adjustable wave count, height, color, smoothness, and copy-ready code.

Resize one image for Instagram, Facebook, Twitter, LinkedIn, and YouTube with crop or fit modes.

Convert between annual, monthly, biweekly, weekly, and hourly salary. Estimate taxes and take-home pay with simplified federal brackets.

Convert time between world time zones. Select source and target zones from major cities. View current time across multiple zones.

Generate a full palette of tints and shades from any color. Get 11 variations from lightest to darkest with hex and RGB values.

Convert between data sizes: bits, bytes, KB, MB, GB, TB, PB. Support both binary (KiB, MiB) and decimal (KB, MB) systems.

Convert between speed units: mph, km/h, m/s, knots, ft/s, and Mach. Includes fun comparisons with walking, cars, planes, and light speed.

Convert between cooking measurements: cups, tablespoons, teaspoons, ml, liters, and grams. Includes temperature conversion and ingredient densities.

Convert between electrical units and use Ohm's law calculator. Calculate volts, amps, watts, ohms, and kilowatt-hours with formula reference.

Convert numbers to written English words. Support integers, decimals, and currency format. Handles values up to trillions.

Advanced Roman numeral converter with batch mode and arithmetic. Convert multiple numbers, add and subtract Roman numerals. Full conversion table included.

Show your public IP from api.ipify.org and fetch city, country, timezone, and ISP data from ip-api.com.

Estimate total fuel needed and trip cost using distance, fuel efficiency, and fuel price in metric or imperial units.

Mix two emojis into a playful layered mashup, copy the combo, and revisit recent emoji pairs.

Upload an image or paste a URL to extract dominant colors and export them as CSS variables or Tailwind config.

Create clip-path CSS with shape presets, draggable polygon points, and a live image preview.

Analyze pasted text for AI-like patterns using transparent heuristics such as sentence uniformity, vocabulary diversity, and a rough perplexity-style score.

Highlight common grammar, spelling, capitalization, and repeated-word issues with a basic rule-based browser checker.

Convert an uploaded image or direct URL into configurable ASCII art with plain-text and color preview modes.

Remove simple backgrounds from images client-side with corner flood fill, tolerance control, and transparent PNG export.

Audit title tags, meta descriptions, H1 usage, image alt text, links, and content signals from a URL or pasted HTML.

Query A, AAAA, MX, NS, TXT, CNAME, and SOA records with TTL values using the public Google DNS JSON API.

Test browser-visible HTTPS reachability, redirect behavior, and exposed security headers with clear client-side limitations.

Find SPF TXT records, parse directives, validate common syntax, and check DMARC presence for a domain.

Upload an image, preview crop or pad conversions for common aspect ratios, and download the result as PNG or JPEG.

Extract SEO, Open Graph, Twitter, and robots tags from a URL or pasted HTML with search and social previews.

Compare two JSON objects and see exactly what changed. Highlights added, removed, and modified fields with a clean visual diff.