Free Developer Tools

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

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.

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

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.

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.

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.

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.

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

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