Tools that run in your browser, not on our server
Hashing, encoding, text, data conversion and image tools. Every one of them processes your file locally — there is no upload step to trust us with.
What this site is
A collection of 73 small tools for the jobs that come up constantly in development, design and office work: hash a string, decode a token, clean a list, convert JSON to CSV, shrink a photo, combine images into a PDF. Browser-only file and text tools. Nothing is uploaded.
The tools here are ordinary. The difference is where they run. A conventional online converter uploads your file to a server, processes it, and sends it back — which means your document now exists on someone else's disk, in their logs, and in whatever backup sits behind them. Here, the file is read by your browser, processed in the tab, and handed back. Nothing is transmitted.
Why that matters more than it sounds
Think about the files people actually paste into online tools. Passwords, API keys and private keys go into hash generators and JWT decoders. Passports and identity documents go into photo resizers. Contracts, payslips and medical scans go into PDF converters and file compressors. In each case the conventional workflow hands a copy to a stranger, and most people never consider it because the interface gives no hint that anything left the machine.
Browse by category
Hash & Checksum
Generate MD5, SHA-1, SHA-256, SHA-512 and HMAC digests, and verify a downloaded file against a published checksum — all computed in your browser.
Encoding & Decoding
Base64, Base64URL, percent-encoding, HTML entities, hexadecimal, binary and JWT. Encode and decode text without sending it anywhere.
Text Tools
Count words, convert naming conventions, deduplicate and sort lists, generate slugs and placeholder text, and extract structured values out of prose.
Data Converters
Convert between JSON, CSV, YAML and XML with correct escaping, type handling and error reporting — plus a strict JSON validator.
Image Tools
Compress, resize and convert images in the browser. Presets for social platforms, print sizes at 300 dpi, and passport photo specifications.
PDF Tools
Assemble JPEG and PNG files into real PDF documents. JPEG data is embedded unmodified, so nothing is re-compressed on the way in.
What people use these for
- Developers — verifying a download against a published checksum, reading a JWT's
expclaim, formatting a JSON payload that a log line mangled, converting a YAML manifest to JSON for a tool that only speaks JSON. - Designers — resizing for a specific platform's storage width, converting a transparent logo without ending up with a black background, sizing a photo for print at a known dpi.
- Office and administrative work — getting a photograph under a form's size limit, turning a stack of scans into one PDF, deduplicating an export before an import that rejects duplicates.
- Everyday use — counting the words in something before submitting it, extracting the links out of a long email thread, working out what size a 2 × 2 inch passport photo is in pixels.
How the site is funded
There is no account system, no subscription and no upload quota. The site is supported by advertising, which is why you will see ads if you have not installed an ad blocker. None of the tools require an account, and none of them are gated behind one.
Where to start
If you are here for a specific job, the categories above are the fastest route. If you want to understand what 'browser-only' actually means — and how to prove it to yourself in thirty seconds — read how it works.