Receipt — session summaryissued · local
Free file tools
that stay on your device.
44 free tools for PDFs, video, images and audio — no sign-up, no watermark, no daily limits. They run inside this browser tab using WebAssembly and WebCodecs, so your file never leaves your device — verify it in the Network panel.
Most “free” PDF tools paywall after two files, watermark your output, or make you sign up. AntiUpload is genuinely free — no limits, no account, no watermark — because everything runs in your browser, so there's no server bill to recoup. Every conversion runs in a Web Worker on your CPU using WebAssembly. Close the tab and the file is gone, even from us.
- ✓No upload server.No staging, no temporary cache, no “we'll email it to you” pipeline. Open DevTools → Network and watch.
- ✓No account, no email.No newsletter trick to “unlock more uploads”. You're not the product.
- ✓No watermark, no file-size cap.Your laptop's RAM is the limit. We're not trying to upsell you.
- ✓Free is the only tier.Banner ads cover Cloudflare's bill. Use an adblocker if you must — the tools still work.
Most used — ~70% of visits
01Compress PDF38% of visits02PDF to Word14% of visits03Merge PDF10% of visits04Compress Image8% of visits
01.Compress VideoTarget a size cap or pick a quality preset.→02.Video ConverterMP4 · MOV · WebM · MKV · AVI, any direction.→03.Video TrimmerCut start, end, or multiple ranges. No re-encode when possible.→04.Video to GIFFrame-rate + width controls with a palette pass.→05.Change Video Speed0.25× to 4×, pitch-preserving audio.→+ 9 more video tools→
—PDF Calculatorin progressEstimate file size before a conversion, page-count math, batch dry-runs.—
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In the oven
held back so we can do them right4 cooking01.Password ProtectcookingFirst pass rasterized text and broke search. Native AES-256 next.→02.Unlock PDFcookingShipping with Protect — they share the same engine.→03.PDF to MarkdowncookingWorking on tables and code blocks before we ship.→04.PDF to HTMLcookingSelf-contained, paste-anywhere. Layout fidelity is the hard part.→
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Common questions
asked first, answered straight5 questionsQ.01Where do my files actually go?
Nowhere. Tools run inside a Web Worker on your device. No upload, no staging server, no temporary cache. The fastest way to verify: open DevTools → Network, then run a tool. The only requests you'll see are the page itself, the WASM module, and CSS. After that, zero.
Q.02Why is this free? What's the catch?
Banner ads. Because everything runs in your browser, the only thing we pay for is a static site on Cloudflare Pages — about $5/month for our traffic. Three ad slots cover it. Use an adblocker if you prefer; the tools work identically. There is no “premium tier” because there's nothing to gate.
Q.03Are the conversions actually any good?
Strong on text-heavy documents — résumés, reports, articles, books. Weaker on complex magazine layouts, math equations, and scanned PDFs in non-Latin scripts. Video and image tools are competitive with desktop apps; some operations are slower because they're CPU-bound on your machine. The full honest breakdown is on the About page.
Q.04Does this work on a phone?
Yes. Drag-and-drop, file pickers, HEIC handling — all work on iOS and Android. Heavy operations (large compress, OCR, video re-encoding) take longer on phones because they're CPU-bound, but they finish. Background tabs may pause processing.
Q.05Can I run AntiUpload offline?
After your first visit, the static assets are cached. Most tools work fully offline. Auto Subtitles (which downloads a ~75 MB Whisper model on first use) is the exception — it labels that fetch clearly before downloading.