Do these developer tools work offline?

Yes, most of our developer utilities work entirely in the browser and can be used seamlessly even when you are offline.

Is my sensitive data (like JSON or JWT) secure?

Absolutely. Your data is processed locally using JavaScript and is never sent to any backend servers or stored anywhere.

Can I handle very large JSON strings?

Yes, our tools are optimized to handle large strings efficiently within your browser's memory constraints.

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Developer Utilities

Format JSON, decode JWTs, test regex, and generate UUIDs instantly.

JSON Formatter / Validator

Format, minify, validate, and copy JSON directly in your browser.

UUID Generator

Generate UUID v4 values in your browser with batch output, format controls, quick copy, and TXT download.

Password Generator

Generate strong passwords in your browser with practical controls for length, character sets, and ambiguous characters.

Base64 Encode & Decode

Encode to and from Base64 instantly in your browser. Handles Unicode correctly without sending data to servers.

URL Encode & Decode

Encode to and from URL-encoded strings safely in your browser. Handles all special characters for URL parameters.

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa. Real-time, fast, and 100% locally processed.

CSV to JSON Converter

Convert CSV data into JSON arrays with delimiter detection, preview, and export in your browser.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes instantly in your browser. No data is ever sent to a server.

JWT Decoder

Decode and inspect JSON Web Tokens (JWT) instantly in your browser. View header, payload, and verify token structure with 100% privacy.

Regex Tester

Test and debug regular expressions in real-time with match highlighting, capture group display, and a built-in pattern library. All processing happens in your browser.

Image to Base64 Converter

Convert any image (PNG, JPG, WebP, GIF, SVG) to Base64 encoded string. Generate data URLs, HTML img tags, and CSS background code — all in your browser.

SQL Formatter / Minifier

Format, beautify, and minify SQL queries directly in your browser. Supports keyword casing and custom indentation.

Frequently Asked Questions

Find answers to the most common questions.