Developer Tools, Directly in Your Browser

Pretty-print, validate, and minify JSON in one click. Great for reading API responses.

Encode and decode text to and from Base64 for auth headers, tokens, and payloads.

Percent-encode or decode URLs and query strings with safe character handling.

Generate random UUIDs (v4) in bulk for keys, names, and database identifiers.

Compute MD5 hashes of text or hex strings instantly for quick checks.

Compute MD5, SHA-1, SHA-256 or SHA-512 hashes of text or files instantly.

Create strong, customizable passwords with letters, digits, and symbols.

Convert between Unix timestamps and human-readable dates in both directions.

Turn JSON into clean, readable YAML for config files and workflows.

Strip whitespace and comments from CSS for smaller, faster stylesheets.

Escape or unescape HTML entities to safely embed text in markup.

Encrypt text into Chinese, English letters or other scripts, with an optional secret key.

Convert numbers between binary, octal, decimal, and hexadecimal.

Compare two texts side by side and spot added, removed and changed lines instantly.

Turn any text or URL into a QR code with custom size, colors and error correction.

Decode QR codes from images - paste, drag & drop or select multiple pictures.

Decode JWT headers and payloads, and verify HS256/384/512 signatures locally.

Translate text to and from Morse code with letter, digit and punctuation support.

Generate RSA key pairs and encrypt or decrypt messages with OAEP padding.

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

Convert URL query strings to JSON and back, including full URLs.

Generate a typed Go struct from a JSON sample in one click.

Pretty-print, minify or validate XML documents instantly.

Parse 5/6-field cron expressions and preview upcoming run times.

Create placeholder images with custom size, colors and text as PNG or SVG.

Browse and search HTTP status codes with RFC descriptions and use cases.

A quick reference of public DNS servers from Google, Cloudflare and more.

Look up the capital of any country, searchable by country or capital name.

Preview and download any website's favicon in multiple sizes.

Encode and decode text to and from Base32, the case-insensitive base encoding.

Encode and decode Base58, the Bitcoin-style alphabet without 0, O, I and l.

Shift letters (ROT13) and digits (ROT5) or both (ROT18) to obfuscate text.

Encrypt and decrypt text with AES-256 in CBC or GCM mode using a passphrase.

Generate TypeScript interfaces and type aliases from a JSON sample.

Generate C# entity classes with properties and attributes from JSON.

Convert a cURL command into Python requests or JavaScript fetch code.

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

Count words, characters, sentences, paragraphs and reading time instantly.

Turn any title into a clean, SEO-friendly URL slug.

Extract every email address from a block of text with one click.

Convert length, weight, temperature, area, volume, speed and data units.

Generate compact, URL-safe NanoID strings with custom alphabet and length.

Generate time-sortable ULIDs and parse any ULID back into its parts.

Generate lorem ipsum placeholder text by words, sentences or paragraphs.

Score password strength with entropy, time-to-crack and clear feedback.

Generate 6-digit TOTP codes from a Base32 secret, RFC 6238 compatible.

Calculate Body Mass Index with WHO categories and ideal weight range.

Split a bill and calculate tip percentages with per-person amounts.

Calculate the exact days, weeks, months and years between two dates.

Pretty-print or minify HTML while preserving script and style blocks.

Format or minify JavaScript/TypeScript code with smart indentation.

Beautify or minify SQL queries with keyword-aware indentation.

Convert XML to JSON or JSON back to XML in one click.

Convert text to decimal/hex/binary ASCII codes and back.

Escape text into \uXXXX sequences or decode them back.

Pick colors and convert instantly between HEX, RGB, HSL and HSV.

Build cron expressions visually with readable descriptions.

Compress JPG, PNG or WEBP images locally with quality and size control.

Search common file extensions and their MIME types by category.

Look up common TCP/UDP ports and the services that use them.