Serverless tools. Your files never leave your device.

How it works

Most online converters upload your file to their server, process it there and send it back. Toolbench works the other way round. When you open a tool, your browser downloads the tool itself: a few kilobytes of code. Your browser then does all the work on your device, using the same technology that runs web apps like Google Docs: WebAssembly for heavy lifting such as PDF and video, Canvas for images, Web Audio for sound and, for background removal, an AI model that runs on your own device.

Toolbench is a static website with no backend: no database, no accounts and no upload server.

What that means for you

• Private. Contracts, bank statements, ID scans and photos never travel over the internet.
• Fast. No waiting for a big file to upload and download again.
• No quotas. No upload limits, daily caps or "upgrade to pro": the only limit is your own device.
• Works offline. Once a tool has loaded, it keeps working without a connection.

Check it yourself

Open any file tool, such as PDF to Word or Image Compressor, then switch off your Wi-Fi or mobile data. It still works. Or open your browser's developer tools (F12), choose the Network tab and use a tool: your file never appears in the list of requests.

The few exceptions, in full

152 of our 157 tools never send anything anywhere. A handful need live information from the internet, and each one says so on its page:

• Currency Converter: To get today's exchange rates, it asks a free rates service for the currencies you pick. The amount you type stays on your device.
• Rhyme & Synonym Finder: The word you look up is sent to the free Datamuse word service to find rhymes and synonyms. Nothing else is sent.
• Website Speed Test: The web address you enter is tested by Google's PageSpeed Insights service. Nothing else is sent.
• What Is My IP: Your public IP address is looked up with ipify and ipwho.is, only when you click. Everything else is read from your own browser.
• YouTube Thumbnail Downloader: Thumbnails are loaded straight from YouTube's image servers using the video's ID. Nothing else is sent.

Some tools download a helper the first time you use them, then run on your device: Remove Background (the AI model), Video to GIF (the video engine), PDF to JPG (the PDF engine), Invoice Generator (the PDF engine), Sign PDF (handwriting fonts), Signature Maker (handwriting fonts), Word to PDF (fonts), Font Pairing (the fonts you preview). Your files are not sent with these downloads.

We don't use tracking cookies or analytics that follow you around the web.

Questions

Are my files uploaded when I use Toolbench?

No. Toolbench is serverless: there is no server of ours to upload to. PDFs, photos, videos, documents and everything you type are processed by your own browser and never leave your device. 152 of our 157 tools never send anything anywhere.

How can a website convert files without a server?

Modern browsers are powerful. They can run compiled code (WebAssembly), draw and edit images (Canvas), process audio (Web Audio) and even run AI models on your device. Toolbench sends your browser the tool once; your browser does the work.

How can I check that nothing is uploaded?

Open a tool, then switch off your Wi-Fi or mobile data and keep using it: it still works. Or open your browser's developer tools, go to the Network tab and watch: no file is ever sent.

Do you store or see my data?

No. There is no account, no database and no server that receives your files or what you type, so there is nothing for us to store, read, sell or leak.

Is it safe for confidential documents?

Yes. Because the work happens on your device, a contract, bank statement, ID scan or medical report never travels over the internet or sits on someone else's server.