Code formatters for JS/TS/HTML/CSS, CSS generators (box-shadow, gradients, glassmorphism), HTTP status lookup, header analyzer, .gitignore generator, and conventional commits. (JSON formatter/minifier has its own dedicated page.)
HTTP headers (analyzer, generator for JSON/REST/GraphQL, cache header generator, status code checker), CORS & rate limit (CORS header generator, policy tester, rate limit header parser), env/config (.env parser, variable template generator, AMQP exchange config), and dev config (ESLint configs for React/Node/TypeScript/Next.js, HTTP retry policy builder with exponential/linear/circuit-breaker).
Format converters (INI to JSON, JSON to TOML, JSON to Toon, MessagePack/CBOR inspector), data tools (Excel data cleaner, Excel sheet merger, dataset analyzer, data anonymizer), code converters (code to cURL, cURL to code, JSON-RPC builder), and analyzers (HAR file analyzer, log file analyzer, package.json validator, MIME type finder).
Fake identity generators (address, email, name, person, phone), random value generators (color, date, time, IP, user-agent), text generators (paragraph, sentence, word), PINs, license keys, image/log placeholders, Open Graph tags, product schema (JSON-LD), and PKCE challenge pairs. (Password and MAC generators have their own dedicated pages.)
Color tools (blindness simulator, palette/shades/tints generator, contrast ratio checker), CSS & media tools (media query generator, CSS to SCSS converter, HTML table to CSV, CSV to HTML table), and generators (conventional commit, Markdown table, Nginx config, IP allowlist). (HTML/CSS/JS minifiers have their own dedicated page.)
Color tools (hex/rgb/hsl/conversion), border/radius CSS generator with preview, and typography CSS generator with live preview. (SVG editor has its own dedicated page.)
Developer Toolkit lets you code formatters for JS/TS/HTML/CSS, CSS generators (box-shadow, gradients, glassmorphism), HTTP status lookup, header analyzer, .gitignore generator, and conventional commits. (JSON formatter/minifier has its own dedicated page.). Everything runs inside your browser — nothing is uploaded to a server. It works on any device with a modern web browser.
Code formatters for JS/TS/HTML/CSS, CSS generators (box-shadow, gradients, glassmorphism), HTTP status lookup, header analyzer, .gitignore generator, and conventional commits. (JSON formatter/minifier has its own dedicated page.) It's ideal for developers, designers, and anyone who needs to code formatters for js/ts/html/css, css generators (box-shadow, gradients, glassmorphism), http status lookup, header analyzer, without installing software or sending data to external servers.
Direct text entry, file upload, or URL-based input — depending on the tool. Paste or type your content directly into the provided editor area.
Yes. After the initial page load, Developer Toolkit runs entirely on your device with no internet connection needed. All processing is done locally.
Tools cover JavaScript, CSS, HTML, SQL, Python, JSON, XML, CSV, and more. Check individual tool descriptions for specifics.
No. All code processing — formatting, minification, conversion, hashing — runs locally in your browser.
Yes. Since processing is local, performance depends on your device. Most operations handle large files without issue.
Yes. SQL uses sql-formatter, JSON uses native JSON.parse, and other formatters follow widely adopted formatting rules.
Yes. All developer tools work fully offline after the initial page load.
Time Converter
Convert between time units including seconds, minutes, hours, days, weeks, months, and years with precise decimal results.
Diff Checker
Compares two input texts side-by-side, highlighting inserted, deleted, and changed lines with distinct background colors.
Regex Tester
Provides an interactive environment where users can write a regular expression pattern, test it against sample strings, and view real-time match.
JSON Formatter
Pretty-prints raw JSON with configurable indent width, key sorting, and bracket collapsing options while flagging syntax errors with exact.
JS Minifier
Strips comments, whitespace, and shortens local variable names in JavaScript source without altering execution semantics.
Base64 Encode/Decode
Encodes text or small files into Base64 strings and decodes them back with automatic MIME-type detection for binary safety.