Process files, debug data, and analyze information directly in your browser. Your data stays on your device.
Local processing
No uploads, no server processing.
Developer grade
JWT, encoding, hashing, and verification tools built for developers.
Open technology
Built with modern browser APIs, WebAssembly, and Web Workers for local processing.
A focused set of developer and file tools that run in your browser, with the full catalog listed on each tool page.
Decode and inspect JSON Web Tokens locally. See the header, claims, and signature without sending the token to a server.
Encode and decode Base64 and Base64URL data in your browser. Built for debugging APIs, tokens, and data streams.
Generate SHA and other hashes from text or files. Verify data fingerprints without uploading anything.
Verify files with SHA hashes. Confirm a download is authentic and free of tampering, all in your browser.
Reduce image file sizes while keeping visual quality. The tool shrinks JPEG, PNG, and WebP files so they load faster on the web.
Strip hidden GPS and camera metadata from your files before sharing. Keep your private details out of public uploads.
Explore FileMint
Choose a category when you know the job, but not the exact tool name.
Built for everyday work
Most file tools send your data to a server, process it, and send it back. FileMint runs the work in your browser, so the file never leaves your device.
For supported tools, your browser does the work. That removes the wait for an upload and download, although speed still depends on the file and your device.
Core file processing is designed to happen locally. Check each tool's page for its supported formats and processing details before using sensitive material.
FileMint does not require an account or subscription for its core tools. Very large files can still be limited by available browser memory.
Traditional file converters force you to upload your data to their servers, process it, and send it back. We run the conversion engines directly in your browser using modern web APIs.
WebAssembly (WASM): Heavy workloads like PDF manipulation and image compression run at near-native speed.
Web Workers: Intensive operations happen on background threads, keeping the UI smooth and responsive.
// Traditional Converter Pipeline
upload() -> serverProcess() -> download()
// FileMint Pipeline
const file = await readFileToMemory();
const result = await wasm.process(file);
downloadLocalFile(result);
A practical comparison of product behavior that matters for privacy, usability, and long-term trust.
| Area | FileMint | Traditional Online Tools |
|---|---|---|
Primary processing model File conversion and editing workflows run locally when browser APIs are available. | Client-side processing in the browser | Often server-side processing after upload |
Account requirement Users can open tools directly without creating a profile. | No account required for core tools | Registration commonly required for higher usage |
Pricing model No trial countdowns for standard workflows. | Free access across the tool suite | Freemium with gated features or quotas |
Offline behavior Progressive Web App support improves reliability for unstable connections. | Many workflows available after first load | Commonly blocked when network is unavailable |
Core file operations are designed to run on-device, reducing exposure of sensitive files during normal use.
By reducing network round-trips, users usually see faster feedback on common editing and conversion tasks.
PWA-ready architecture helps users continue with many workflows when internet access is limited.
A free and no-signup experience supports students, freelancers, and teams that need utility without subscription friction.
The platform is built around local-first execution, clear policy pages, and transparent product behavior. This supports stronger user trust and cleaner quality signals for search and ad policy review over time.
Expert tips, guides, and insights to help you work smarter with your files
Why do most "free online converters" force you to upload your files to their servers? We explain the privacy risks of server-side processing and how modern web apps avoid it.
That free PDF converter you just used? It probably kept a copy of your file. Here is what really happens when you upload documents to online tools.
Ever tried to compress a PDF only to find the new file is twice as large? Here is a technical breakdown of why this happens and how to actually shrink your documents.
Learning hub
Short, practical guides on how local processing works and why it keeps your data private.
Why running tools in your browser keeps files off servers.
The engine that runs heavy workloads at near-native speed.
Headers, claims, and signatures explained without the jargon.
Verify integrity and detect tampering with a fingerprint.
Everything you need to know about Filemint's free online tools
Have more questions? Contact our support team