Your dev toolbox

Format, validate and beautify JSON online. Free, instant, runs entirely in your browser. No data leaves your device.

Convert JSON to YAML format instantly. Free, runs entirely in your browser. No upload, no signup, supports nested structures.

Convert YAML to JSON instantly. Choose 2-space, 4-space, or minified output. Free, browser-based, no signup required.

Convert JSON to well-formed XML in your browser. Choose root element name and indentation. Free, instant, private — nothing is uploaded.

Convert XML to JSON instantly in your browser. Handles attributes, nested elements, and arrays. Free, private — nothing is uploaded.

Convert JSON arrays of objects to CSV format. Pick comma, semicolon, or tab delimiter, toggle headers. Free, browser-based, no upload needed.

Encode or decode Base64 strings in your browser. Supports UTF-8 text and URL-safe Base64 (RFC 4648). Free, instant, private — nothing is uploaded.

Encode or decode URL components. Free, browser-based, instant.

Encode or decode HTML entities. Free, browser-based, no upload.

Decode and inspect JWT tokens. Free, browser-based, no token leaves your device.

Generate MD5 hashes instantly in your browser. Free, private, no upload — paste text and get the hex digest immediately.

Generate SHA-256, SHA-384, SHA-512, and SHA-1 hashes in your browser. Free, instant, private — no upload required.

Generate HMAC signatures with HMAC-SHA-256, HMAC-SHA-512, HMAC-SHA-384, or HMAC-SHA-1 in your browser. Keys never leave your device.

Test a plaintext password against a bcrypt hash in your browser. All comparison is local — nothing is transmitted. Free, instant, private.

Generate UUID v1, v4, v7, or NIL in bulk. Browser-based, instant, free. v7 is timestamp-ordered and recommended for database primary keys.

Generate random strings with custom length and character sets. Use for tokens, passwords, IDs, and test data. Free, browser-based, cryptographically random.

Generate strong, secure passwords. Free, browser-based, never leaves your device.

Generate Lorem Ipsum placeholder text. Free, browser-based.

Test and debug regular expressions in real time. See matches, capture groups, and indices instantly. Free, browser-based.

Compare two text blocks and highlight additions and removals. Line, word, or character-level diff. Free, browser-based.

Live preview Markdown as you type. Switch between GFM and CommonMark, export to raw or escaped HTML. Free, browser-based.

Minify or beautify CSS code online. Strip whitespace and comments to shrink CSS, or format it with clean indentation. Free, instant, browser-based.

Minify or beautify JavaScript code in your browser. Strip comments and whitespace to shrink JS, or format it with clean indentation. Free, instant, private.

Minify or beautify HTML in your browser. Remove whitespace and comments to shrink markup, or format it with clean indentation. Free, instant, private.

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

Format and beautify SQL queries. Free, browser-based.

Convert colors between HEX, RGB, HSL, OKLCH and OKLab instantly. Free, browser-based — no data leaves your device.

Extract dominant colors from any image. Get HEX and RGB values, copy as CSS variables, JSON or Tailwind config. Runs entirely in your browser.

Parse and explain cron expressions in plain English. See the next 5 run times with timezone support. Free, instant, browser-based.

Convert Unix timestamps to ISO 8601, RFC 2822, UTC, local time and relative time. Supports seconds, milliseconds and date strings. Free, browser-based.

Convert a date and time between any IANA timezones. Shows UTC offset, abbreviation (EST, BRT, JST) and handles daylight saving automatically. Free…

Convert numbers between binary (2), octal (8), decimal (10) and hexadecimal (16). Supports prefix auto-detect (0x, 0b, 0o), custom base 2-36, and grouped…

Convert between units of length, mass, temperature, time, data, speed, area, and volume. All conversions run in your browser. Free, instant, no signup.

Generate QR codes from any text, URL, vCard, or WiFi config. Customize size, colors, and error correction. Download PNG or SVG instantly, no signup.

Optimize and minify SVG files in your browser. Remove comments, metadata, collapse whitespace, pretty-print. Free, private — nothing is uploaded.

Convert images to Base64 data URIs in your browser. Get plain Base64, Data URL, HTML img tag, or CSS background. Free, private — images never uploaded.

Complete HTTP status code reference with descriptions, RFC sources, and when-to-use guidance. Search by code or keyword. Free, instant, no signup.

Parse any User-Agent string to extract browser, engine, OS, device type, and CPU architecture. Includes auto-detect for your own browser. Free, instant…

Visually create CSS gradients (linear, radial, conic) with a live preview. Add up to 6 color stops, pick direction, and export as CSS, Tailwind, or SVG…

Check which favicons a website has — favicon.ico, apple-touch-icon, PWA manifest icons, and more. Instant visual preview with recommendations. Free…