How browser-based tools keep your files private
Updated 21 October 2026
Short answer: most SaveForMeNow tools run entirely inside your web browser. Your images, PDFs, videos, audio and text are processed on your own device and are never uploaded. Only the video downloader and the link shortener use our server, because they have to.
How it works
Modern browsers can run serious software. When you open a tool, your browser downloads the program once, then does the work locally:
| Technology | Used for |
|---|---|
| Canvas and WebAssembly image encoders | Compressing, resizing and converting images |
| PDF.js, pdf-lib and qpdf (WebAssembly) | Merging, splitting, signing, protecting PDFs, PDF to Word |
| ffmpeg (WebAssembly) | Converting, compressing, trimming and merging video and audio |
| AI models (ONNX, WebGPU) | Background removal, upscaling, watermark removal, transcription |
| Tesseract | Reading text from images (OCR) |
AI models download the first time you use a tool (from about 5 MB to 80 MB) and are then cached by your browser.
Which tools use a server?
| Tool | Why | What's kept |
|---|---|---|
| Video downloader | Social sites can't be read from a browser directly | Files deleted within one hour; no history of links |
| Link shortener | A short link has to redirect from somewhere | The link and a hashed IP address for rate limiting |
Everything else stays on your device.
How to check for yourself
- Open a tool, such as compress PDF.
- Once the page has loaded, turn off Wi-Fi or switch to aeroplane mode.
- Add a file and run the tool. It still works, because nothing is being sent anywhere.
You can also open your browser's developer tools (F12) → Network tab and watch: no request carries your file.
Why it matters
- Confidential documents like contracts, payslips, IDs and medical letters never sit on someone else's server.
- No size or daily limits imposed to save server costs.
- Speed: no waiting for uploads and downloads of large files.
- No account needed, because there's nothing to store.
The trade-offs
Very large files depend on your device's memory, so a computer handles more than a phone. Video work is best up to about 120 MB, and AI tools are fastest on devices with WebGPU (recent Chrome, Edge and Safari).
Read more in our privacy policy and about page.