Why FileWise doesn't upload your files
Most online converters send your file to a server, process it there and send it back. That costs them money, so they add daily limits, watermarks or sign-ups, and it means a copy of your photo or document sits on someone else's computer, at least for a while. Modern browsers are powerful enough to do this work themselves. FileWise uses the image engine built into your browser (the Canvas API) and, where that isn't enough, small WebAssembly programs that run on your device, such as libheif for HEIC photos. Your files are read from your disk, processed in memory and saved straight back to your Downloads folder.
You can check this yourself: open a tool, disconnect from the internet, and it keeps working.
Which tool do you need?
- A photo is too big to email or upload? Use the image compressor. Choose a quality, or type a target such as 200 KB and it finds the best quality that fits.
- A site wants an image of an exact size? The image resizer sets width and height in pixels, or scales by a percentage.
- Your iPhone photos won't open on Windows or in a web form? Convert HEIC to JPG, several at once.
- Building a website? The WebP converter makes images 25–35% smaller than JPG at the same quality.
- Need to send several scans or invoices as one file? Merge PDFs into a single document.
Good habits with image files
- Keep your originals. Compression that throws away detail can't be undone. Save the smaller copy alongside the original, not over it.
- Resize before you compress. A 4000-pixel photo shown 1200 pixels wide wastes most of its bytes. Reducing the dimensions usually saves more than lowering the quality.
- Pick the format for the content. JPG or WebP for photos, PNG for screenshots, logos and anything with sharp text or transparency.