Developer Utilities

Test regular expressions with live match highlighting.

Compare two blocks of text or code side-by-side.

Deduplicate and sort lines with case, whitespace, and natural numeric filters.

Convert headlines into clean URL permalinks with unicode transliteration.

Convert text between camelCase, snake_case, kebab-case, and more.

Count words, characters, sentences, and reading time, with keyword frequency.

Format, validate, and convert JSON to TypeScript types.

Convert JSON arrays or objects into SQL INSERT statements across 5 dialects.

Deep recursive side-by-side JSON comparison with key mutation detection.

Query JSON documents with JSONPath expressions.

Convert between YAML and JSON.

Convert XML documents to JSON and back, with attributes preserved.

Convert SQL DDL tables to Prisma, Drizzle ORM, and TypeORM schemas.

Convert GraphQL schema SDL to type-safe TypeScript interfaces and resolvers.

Plan version bumps and test npm/cargo caret (^) and tilde (~) range resolution.

Migrate tailwind.config.js to modern Tailwind CSS v4 @theme variables.

Format and beautify SQL queries.

Convert SVG to clean React, Vue, Svelte, or React Native components.

Encode and decode HTML entities.

Escape and unescape strings for code, JSON, and shells.

Convert between CSV and JSON, with proper quoted-field handling.

Live Markdown to HTML preview with copyable output.

Parse, encode, and decode URLs and query strings.

Convert cURL commands into code in multiple languages.

Convert between docker run commands and Compose files.

Audit Dockerfiles for security, caching, and generate multi-stage builds.

Calculate subnet ranges and host counts from CIDR blocks.

Search, compare, and troubleshoot HTTP status codes and semantics.

Simulate CORS preflight headers and generate server middleware.

Audit security header grades and generate Nginx, Apache, and Caddy configs.

Verify Stripe, GitHub, Shopify, and Svix webhook HMAC SHA-256 signatures.

Generate code_verifier, code_challenge, and OAuth 2.0 authorization URLs.

Analyze HTTP Archive (.har) waterfalls, payload sizes, and detect leaked auth tokens.

Generate MD5, SHA-1, SHA-256, and other hash digests.

Hash and verify passwords with bcrypt.

Generate RSA public/private key pairs.

Encode and decode Base64 and Base64URL strings.

Decode and inspect JWT header, payload, and signature.

Generate signed JWTs for testing.

Decode and inspect SSL/TLS certificates.

Build and validate Content Security Policy (CSP) headers.

Generate Subresource Integrity (SRI) hashes for script and link CDN tags.

Generate strong random passwords with an entropy strength meter.

Generate a secure, random base64-encoded Laravel APP_KEY for .env files.

Generate realistic fake data for testing.

Generate placeholder text by paragraphs, sentences, or words.

Calculate and explain Unix file permission codes.

Generate UUID v4/v7, NanoID, and ULID identifiers.

Decode timestamps and worker IDs from UUIDv7, Twitter Snowflake, and ULID.

Inspect JavaScript keyboard events, key codes, and modifier keys.

Generate and validate email DNS records for anti-spoofing and deliverability.

Visualize AWS IAM policy permissions.

Generate a .gitignore from curated language and tool templates.

Convert Unix timestamps to and from human-readable dates.

Calculate exact duration between dates with weekend and workday exclusions.

Translate cron expressions into plain English.

Visualize upcoming cron execution timelines and build schedules visually.

Calculate fluid typography and responsive spacing with CSS clamp().

Design organic blobs, squircles, and 8-point fancy border-radius shapes.

Craft multi-stop linear, radial, and conic gradients with live canvas preview.

Design frosted glass CSS cards with live backdrop blur and refraction.

Create smooth multi-layered realistic CSS and Tailwind box shadows.

Calculate aspect ratios, responsive dimensions, and retina image srcsets.

Generate @font-face unicode-range rules to subset web fonts for performance.

Convert colors and check contrast ratios for accessibility.

Compare a time across multiple timezones for scheduling.

Convert between data sizes, time durations, and CSS length units.