Image format converter
Convert local images between PNG, JPG and WebP.
Private: it runs in your browser and your file is never uploaded. How to check it
Up to 25 MB · 40 megapixels · 16,384 px per side. Processed locally.
You can also drag or paste (Ctrl+V) an image onto this page.
You can choose several images (up to 30): they are processed with the same settings and downloaded as a ZIP.
View generated image
Reprocessing can change metadata and color profiles. JPG does not preserve transparency. Inspect background and opacity in the preview; each tool’s settings determine the result.
Your files are processed here, on your device
We do not send the contents of your files or text to any server: everything is processed in your browser’s memory. No account is needed, there is no daily quota and we use no analytics or trackers. Each tool has size limits to protect your device’s memory.
A connection is only needed to load the site. After that you can disconnect and the tools keep working (some previews may need the connection). Hosting may receive technical visit data. Favorites store only tool identifiers in this browser.
How we handle your data →How to use this tool
- Load a PNG, JPG or WebP image.
- Choose a destination-supported format that retains transparency if needed.
- Download and check background, colors and file size.
An example you can verify
Change format to make an image compatible with its destination.
Example input
Transparent PNG; JPG output.
Expected result
JPG with white where transparency existed.
Use PNG or WebP to retain transparency. Exporting may change metadata and color profiles.
Image format converter: uses and practical guidance
Converting an image changes its file format to suit an application, page or upload form. Choose according to both the content and the destination. JPG is often useful for photographs, PNG for graphics requiring transparency, and WebP for combinations supported by the receiving system. Renaming a file extension does not convert the underlying data. A new encoded copy is required for the selected format to work correctly.
Transparency deserves particular attention. JPG has no alpha channel, so this tool fills transparent areas with white. A logo intended for a dark background may acquire an opaque rectangle that was absent in the source. Choose a transparency supporting format when that property is needed. Inspect edges and lettering too: compression can affect a photograph differently from a screenshot containing fine text and flat coloured regions.
Conversion may change metadata and colour profiles. Do not treat the result as a substitute for an editing source that depends on those properties. A format change can help reduce byte size, but does not guarantee a smaller file. Compare the downloaded copy’s actual size and its appearance at the intended display dimensions before deciding which version to publish. The smallest file is not always the one that preserves the detail your audience needs.
Open the result in its receiving system to confirm compatibility. Inspect background, colours and fine detail. Resize with a clear purpose when different dimensions are also required, avoiding unnecessary chains of lossy conversions. Keep the original and name versions so their format and intended use are recognizable. Image to Base64 performs a different operation when the goal is to represent an image file as text rather than change its image format.
A practical check before using the result
To choose a format, test a photograph and a transparent graphic separately. Compare outputs without assuming one format is best for both. Inspect bytes, background and lettering in each download. If the destination rejects a file, check its accepted formats instead of merely renaming the extension. Valid conversion must produce data in the selected representation. Keep the source to avoid accumulating losses and record which property motivated each variant: compatibility, transparency or size. This helps maintain a consistent criterion for additional resources and reassess earlier choices when requirements change. Review the actual destination rather than judging compatibility solely from a successful local preview.
Settings and limits
Choose an image and output format. PNG suits graphics with transparency; JPG often suits photos; WebP supports both. Output metadata or color profiles may change.
Frequently asked questions
What happens to transparency when converting to JPG?
Transparent areas are filled with white because JPG has no transparency channel.
Is it free, and do I need to sign up?
Yes, it is free. You do not need to sign up, create an account or install an app, and there is no daily quota: open the tool and use it. The only limits are file sizes, which protect your device’s memory.
Does it leave a watermark on the result?
No. Snipshed adds no watermark, logo or text of its own to the files you download: the result is yours exactly as you configured it.
Is quality lost?
It depends on the target format: PNG keeps every pixel, while JPG and WebP may discard information to weigh less, and JPG has no transparency. Pick the format for your use and compare the result.
Does it work on iPhone and Android?
Yes, from your phone’s browser (Safari, Chrome…) and without installing any app. When it finishes, the file is saved from the browser itself: on iPhone it appears in the Files app and on Android in Downloads. With very large files the phone may run out of memory; try a smaller file or a computer.
Guides
Choose by content and transparency, then compare the output without assuming it will always be smaller.
Distinguish pixels from bytes and prepare a suitable image copy for a form or website.
Learn what hidden data a photo carries, how to remove it in your browser and what information remains visible.