Developer Tools

Beautify, minify & validate JSON instantly.

Encode text to Base64 or decode it back, instantly.

Percent-encode or decode URLs and query strings.

Generate random v4 UUIDs in bulk.

Decode a JWT to read its header and payload.

Convert Unix timestamps to human dates and back.

Encode special characters to HTML entities or decode them back.

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

Test regular expressions against text with live match highlighting.

Compare two blocks of text and see the differences.

Minify CSS to cut file size, or beautify it back.

Shrink JavaScript by removing whitespace and comments.

Minify HTML markup to reduce page weight.

Convert YAML to JSON and JSON back to YAML.

Translate a cron expression into plain English.

Generate an embeddable countdown timer.

Format and indent minified JavaScript.

Measure how much your text, CSS, JS, or HTML shrinks with gzip and deflate, right in your browser.

Build a ready-to-paste Nginx gzip block with the right MIME types and compression level.

Generate an Nginx location block with expires and Cache-Control headers per file type.

Build a Cache-Control header value with max-age, immutable, no-store, and more, explained in plain language.

Build clean 301 and 302 redirects for Nginx, including www and HTTPS canonical rules.

Translate common .htaccess redirect and rewrite rules into equivalent Nginx directives.

Drop in a HAR export from your browser to see total page weight, request count, and a full breakdown by type and domain. Runs entirely in your browser.

Open or paste a Markdown file and read it beautifully rendered with GitHub-style formatting. Fast, private, and runs entirely in your browser.

Pick your project type and coding style to generate a ready-to-paste .editorconfig file. Runs in your browser.

Select your tech stack and download a clean .gitignore file that covers common build artifacts and editor junk. Runs in your browser.

Paste raw HTTP response headers and get a plain-English breakdown of each one, including security, caching, and content directives. Runs in your browser.

Paste any .htaccess block and get a plain-English explanation of what each directive does. No server needed, runs in your browser.

Paste a sample JSON object and generate a JSON Schema (draft-07) automatically. Copy or download the schema. Runs in your browser.

Test JSONPath expressions against a JSON document and see matching results instantly. Runs in your browser.

Searchable reference for all HTTP status codes, with descriptions, typical causes, and when to use each one.

Break any URL into protocol, host, port, path, query parameters, and fragment. Edit parts and rebuild the full URL instantly. Runs in your browser.

Look up the MIME type for any file extension, or find extensions for any MIME type. Full searchable table with 300+ types. Runs in your browser.

Define a schema with field names and types (string, number, email, UUID, date, name, address) and generate realistic fake JSON data in seconds. Runs in your browser.

Apply AND, OR, XOR, NOT, left shift and right shift to two numbers. See results in decimal, hex, binary, and octal with a bit-pattern visualizer. Runs in your browser.