What works
Almost every tool works in a phone browser exactly as it does on a computer: text tools, calculators, converters, image tools and most PDF tools. Use Chrome on Android, or Safari on an iPhone or iPad. On an iPhone, Chrome and the other browsers use Safari’s engine underneath, so a tool behaves the same in all of them.
Firefox on Android cannot run most video tools, because it has no video encoder. Video to MP3 Converter, the Video Frame Extractor and every other tool work in it as usual.
What is harder on a phone
The tools do their work in your browser, using your device’s memory. A phone gives a browser tab a small fraction of the memory a computer does, so the jobs that need the most memory are the ones that struggle:
- Long or high-resolution videos. A video tool warns you when a video looks too heavy for the device. Take the warning seriously on a phone: cut the video into shorter parts with the Video Splitter first, or use a computer.
- Large PDFs and very large photos. They are slower, and above a point the tab may close. See File too large.
Keep the screen on while a video is processing. When the phone locks, or you switch to another app, the browser pauses the page and the job can stop.
Where your files go
- Android: downloads go to the Downloads folder, and Chrome shows a notification you can tap to open the file.
- iPhone and iPad: Safari asks whether to download the file, then saves it to Downloads in the Files app. To put an image into Photos, open it in Files and use Share, then Save Image.
If a download does not start at all, see The download did not start.
Choosing files
The file picker offers your photo library, your files and, on some phones, the camera. Photos from an iPhone camera are usually HEIC; if one will not open, see iPhone HEIC photos will not open.