Image Format Converter
WebP, JPEG and PNG, converted without uploading anything.
- Runs entirely in your browser
- Nothing is uploaded
- Works offline once loaded
Which format to choose
- JPEG — smallest files for photographs. No transparency, so transparent areas are flattened onto white. Universally supported.
- PNG — lossless with full transparency. Much larger files. Best for graphics, logos, screenshots and anything with sharp edges or text.
- WebP — noticeably smaller than JPEG at comparable quality, with transparency support. Now supported by every current browser.
Why you would convert
The most common reason is that something will not accept the format you have. WebP in particular is now served by many websites but still rejected by plenty of older upload forms, print services and desktop applications.
The other reason is size. Converting a large PNG photograph to JPEG or WebP often cuts the file to a fraction of its original size with no visible difference, because PNG is a poor fit for photographic content.
The quality slider only affects JPEG and WebP. PNG is lossless, so the slider is ignored when converting to it.
Choosing a quality level
- 90 to 95 — visually indistinguishable from the original for most images. A sensible default.
- 75 to 85 — noticeably smaller, with artefacts only visible if you look closely at fine detail.
- Below 70 — clearly visible degradation, especially around text and sharp edges.
Frequently asked questions
Why did my transparent background turn white?
JPEG has no alpha channel, so transparency cannot be preserved. Transparent areas are filled with white during conversion.
To keep transparency, convert to PNG or WebP instead.
Can I convert HEIC photos from my iPhone?
No. Browsers cannot decode HEIC. Change your iPhone camera setting to Most Compatible so it saves JPEG, or convert on the device first.
Can I convert several images at once?
Not currently — one at a time. Batch conversion is on the list.
Is my file uploaded anywhere?
No. This tool runs entirely in your browser using the File API and a canvas element. Your file is read from your own device, processed on your own hardware, and returned to you.
You can verify this: load the page, disconnect from the internet, then use the tool. It will work normally. A tool that uploaded your file could not.
It will not open my file
Browsers can only decode certain formats natively. HEIC photos from an iPhone, camera RAW files and some older video codecs cannot be opened by a browser at all.
Converting to JPEG or MP4 first will usually solve it.
Every SnapView tool runs inside your browser. Files you open here are read by your own device and are never uploaded, stored or transmitted anywhere. You can disconnect from the internet after this page loads and the tools will still work — which is the simplest way to verify that claim for yourself.