Accelerate your coding workflow with our free developer utilities. Format JSON, beautify HTML/CSS/JS, inspect code diffs, convert YAML to JSON, and inspect API responses. Built with developer experience in mind, these utilities offer syntax highlighting, error validation, copy-to-clipboard, and code downloading options. Everything runs locally inside your browser, ensuring no code leaks to external servers.
Format, validate, prettify, minify, and clean JSON payloads.
Convert structured JSON strings into valid XML format.
Convert raw XML code into structured JSON format.
Export arrays of JSON data objects into comma-separated value sheets.
Import CSV tables and convert them into structured JSON arrays.
Encode characters to secure HTML entities or decode safe entities.
Remove comments, spaces, and duplicate lines to shrink CSS file size.
Compress and minify raw JavaScript files to speed up web load times.
Beautify, indent, format, and align raw database query statements.
Decode JSON Web Token payloads, headers, and verify signatures.
Build schedule patterns visually and export cron expressions.
Test text strings against regular expressions and view matched groups.
Parse browser client header strings to detect OS, device, and version details.
Generate bulk unique random UUIDs (v4) for testing databases.
Convert between HEX, RGB, HSL, and CMYK color codes.
Convert JSON object payloads into draft-07 JSON Schema templates.
Build and digitally sign JSON Web Tokens with custom payloads and keys.
Visually diagram and break down the components of regular expressions.
Convert SQL CREATE TABLE definitions into JSON schema specifications.
Simulates javascript code snippet execution in browser console sandbox.
Send GET, POST, PUT, PATCH, DELETE requests and inspect responses — a mini Postman in your browser.
Format and indent messy HTML code into clean, readable markup instantly.
Convert YAML to JSON and JSON to YAML bidirectionally with instant preview.
Compare two code snippets side by side and visualize additions, deletions, and changes.
Our tools are built with security, high-performance, and excellent UI in mind. Here is what makes them unique.
Clean color coding for easy readability.
Code never leaves your browser.
Quick actions for copying, clear, upload, and download.
Find answers to common questions about Developer Utilities.
Easily pivot to other tool suites and developer resources.