Are Rapid DevTools utilities free?

Yes. Every tool in the Rapid DevTools directory is free to use and does not require an account.

Do the tools upload my input to a server?

No. The tools are designed to process your input locally in the browser, so JSON, tokens, files, and text snippets are not uploaded to Rapid DevTools servers.

Which developer tools are available?

Rapid DevTools includes JSON formatting, JSON to YAML conversion, JWT decoding, hash generation, password generation, Base64 and URL encoding, regex testing, text diffing, UUID generation, timestamp conversion, color conversion, QR code generation, and PDF utilities.

Free Online Tools For Developers

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14 browser-based tools

Free online developer tools for everyday engineering work

Format JSON, decode JWTs, test regex, generate hashes, convert timestamps, merge PDFs, and handle common developer tasks without installing software or uploading your tool data.

Popular starting points

{ }JSON FormatterFormat, validate, minify, sort keys, and inspect JSON with browser-only processing.YAMLJSON to YAML ConverterConvert JSON and YAML for configs, manifests, OpenAPI files, and developer workflows.JWTJWT DecoderDecode, inspect, encode, and verify JSON Web Tokens locally in your browser.#Hash GeneratorGenerate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes instantly.

JSON tools

2 utilities for json workflows.

{ }JSON

JSON Formatter

Format, validate, minify, sort keys, and inspect JSON with browser-only processing.

YAMLJSON

JSON to YAML Converter

Convert JSON and YAML for configs, manifests, OpenAPI files, and developer workflows.

Security tools

3 utilities for security workflows.

JWTSecurity

JWT Decoder

Decode, inspect, encode, and verify JSON Web Tokens locally in your browser.

#Security

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes instantly.

PASSSecurity

Password Generator

Create strong random passwords with configurable length, symbols, and character sets.

Encoding tools

2 utilities for encoding workflows.

B64Encoding

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 strings for APIs, files, and debugging.

URLEncoding

URL Encoder / Decoder

Encode and decode URLs, query strings, and special characters safely.

Text tools

2 utilities for text workflows.

REGEXText

Regex Tester

Test regular expressions with live matches, flags, and capture group feedback.

DIFFText

Text Diff Checker

Compare two text snippets and see added, removed, and unchanged lines instantly.

Utilities tools

4 utilities for utilities workflows.

UUIDUtilities

UUID Generator

Generate random UUIDs for identifiers, test fixtures, and distributed systems.

TIMEUtilities

Timestamp Converter

Convert Unix timestamps to readable dates and dates back to epoch time.

HEXUtilities

Color Converter

Convert HEX, RGB, and HSL colors for CSS, design systems, and UI work.

QRUtilities

QR Code Generator

Create custom QR codes from URLs or text and download them as PNG images.

Files tools

1 utility for files workflows.

PDFFiles

PDF Tools

Merge PDF files and add page numbers entirely in the browser with no uploads.

Why this directory helps you move faster

Tool pages are grouped around the jobs developers search for every day: debugging API responses, validating tokens, converting encoded strings, comparing text, and preparing small files. Each utility includes usage notes, examples, and related links so you can solve the task and discover the next useful tool quickly.

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No server uploads

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