How Toolest is built, why your files stay on your device, and how to check it yourself.
Last updated: 28 July 2026
What Toolest is
Toolest is a free workspace of 143 tools for files, text and developer tasks. Converters, compressors, editors, generators. The idea is that everyday file work should not require ten different websites, each with its own ads, sign-up walls and upload limits.
No account, no ads, no file limits, no watermarks. You drop a file and the tool runs. The result downloads by itself, big batches arrive as a single ZIP, and you can paste a screenshot straight from your clipboard if opening the file picker feels like too much work.
Local-first, by architecture
141 of the 143 tools run entirely inside your browser. That is not a marketing line, it is how the thing is built. Images go through the Canvas engine your browser already ships with. PDF, OCR and archive work run as WebAssembly. Hashing and encryption use the Web Crypto API. Your file gets opened in your device's memory, transformed there, and saved back to your disk.
In those tools there is no upload step we generously decided to skip. The code for uploading simply does not exist there.
This is also why the site is fast. A 20 MB photo converts in less time than other sites need just to upload it. It is also why there are no pricing tiers based on file size: your hardware does the work, so there is no server bill to pass on to you.
Do not take our word for it
If you are technical, or just skeptical (fair), you can check all of this in about a minute:
Open DevTools (F12), go to the Network tab, and run any conversion, say PNG to JPG. You will see the tool's JavaScript being fetched and nothing else. No POST with your file in it. No upload at all.
To be fully transparent: you will notice one small beacon to /api/analytics/hit. Click on it and read the payload. It contains the page path. That is the entire analytics system.
The strongest test: load a tool page, switch to airplane mode, then convert your file. It still works, because nothing ever needed to leave your machine.
The 2 server-backed tools listed below are the exception, and each one says so on its own page. Check the Network tab there and you will see the upload, exactly as declared.
The 2 exceptions: Compress PDF, URL Shortener
2 tools use our server, each for a concrete technical reason. Compress PDF do heavy PDF processing that can need more memory than a browser tab can reliably offer on large documents. URL Shortener is server-side by definition: a short link has to live somewhere public, otherwise it stops redirecting the moment you close the page.
Here is what happens to a file you send them. It travels over HTTPS to our server in the EU (europe-west1). It is processed in temporary storage and deleted in the same request that returns your result. The cleanup runs even when the processing fails. Files are never written to logs, never inspected, never used for anything beyond producing the output you asked for. Uploads are capped at 25 MB per file and rate-limited. The URL shortener stores the destination URL and an anonymous click count, nothing else.
Privacy beyond the files
No sign-up, no account, no advertising, no cookies, no profiling trackers. The only thing collected is an anonymous page count: which page was viewed and which tool actually ran, so we know which tools deserve attention. We have no way of knowing who you are, and nothing to sell even if we wanted to.
The full details, including exactly what that analytics beacon contains, are in the Privacy Policy and Cookie Policy.
Why it exists
Toolest is built and maintained by an independent developer in Italy. It started as frustration with slow, ad-heavy converter sites that upload your files to a server for jobs a browser can do locally in milliseconds, and then charge you for it.
The goal is to be the fastest path from "I have this file" to "I have the file I need". Fewer clicks, no dark patterns, and honesty about how everything works. This page included.
Get in touch
Found a bug? Want a tool that is missing? Want to challenge any claim on this page? Write to privacy@toolesthub.com.