Tools that just work.

A small, fast collection of utilities for developers and everyone else. No sign-up, no upload, no waiting.

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Your data never leaves the tab Loads in under a second Works offline once opened

Developer

6 tools

JSON Formatter

Beautify, minify and validate JSON with precise error positions.

Timestamp Converter

Unix epoch to human date, in any timezone, both directions.

Base64 Encoder

Text and files to Base64 and back, including data URLs.

JWT Decoder

Read a JSON Web Token header, payload and expiry safely.

URL Encoder

Percent-encode, decode and take query strings apart.

Diff Checker

Compare two texts line by line with character-level highlights.

Generators

4 tools

Hash Generator

MD5, SHA-1, SHA-256, SHA-384 and SHA-512 for text or files.

UUID Generator

Bulk UUID v4 and v7, plus short IDs and ULID-style keys.

Password Generator

Strong random passwords and passphrases with an entropy readout.

QR Code Generator

Create crisp QR codes for links, Wi-Fi, text and contacts.

Text

3 tools

Subtitle Converter

SRT, VTT, ASS and SBV — plus timing shift and encoding repair.

Word Counter

Words, characters, reading time and keyword density.

Case Converter

camelCase, snake_case, kebab-case, Title Case and more.

Images & Colour

2 tools

Image Compressor

Shrink and convert JPEG, PNG and WebP without uploading.

Color Converter

HEX, RGB, HSL and OKLCH with contrast checking.

Why another tools site?

Most online converters and formatters send your input to a server, wrap it in three layers of ads and make you wait for a round trip to do work your laptop could finish instantly. This one does the opposite: every tool here is plain HTML, CSS and JavaScript that runs inside your browser tab.

That has real consequences. Your API keys, tokens, customer exports and personal photos are never transmitted, so there is nothing to leak and no retention policy to read. Pages are small enough to open on a bad connection, and once a tool has loaded it keeps working with the network switched off. There are no accounts, no usage limits and no “upgrade to process files larger than 5 MB”.

Every tool is also a permanent, stable URL. Bookmark /json-formatter/ or /timestamp-converter/ and it will still be there, at the same address, doing the same thing.