Image Converter
Saves images as PNG, JPEG, WEBP or BMP. Choose quality and size, and turn a solid background transparent.
Conversion, resizing, and background removal all run in your browser. Background removal erases edge-connected areas of similar color — best on plain backgrounds.
How the formats differ
Before choosing an extension, look at what is inside the image: a photograph, text and logos, or artwork that needs a transparent background. The sizes below were measured by saving the same 2048×1536 photo with this tool.
| Format | Transparency | Compression | Photo example | Best for |
|---|---|---|---|---|
| PNG | Yes | Lossless | 5,808.9 KiB | Logos, icons, screenshots, masters you will edit again |
| JPEG | No (filled white) | Lossy | 391.1 KiB (85%) | Photographs, upload forms that need wide support |
| WEBP | Yes | Lossy (quality) | 241.8 KiB (85%) | Web pages, blogs, online shops |
| BMP | No (filled white) | Uncompressed | Very large | Compatibility with older software |
For that photo, WEBP at 85% was 38% smaller than JPEG at the same setting, with a 0.4 dB difference in measured quality (PSNR). A transparent logo goes the other way: WEBP is larger than JPEG because it also stores the transparency.
How to use
- Drag images into the window or click to browse. You can add several at once; PNG, JPG, WEBP, GIF, BMP, SVG, AVIF and ICO are accepted as input.
- Choose the output format on each card and change the width or height if needed. With ratio lock on, entering one side fills in the other. Pick 70%, 85% or 95% quality for JPEG and WEBP at the top of the page.
- Turn on background removal if you need it and tune the sensitivity. Switch the preview background colour to check the edges, then download. For several files, use “Convert all” and “Download all”.
Tips by situation
- Blogs and product pages: WEBP at 85% gave the best quality for the size in our tests. Some upload forms reject WEBP, so re-save as JPEG 85% if that happens.
- Transparent logos: save as PNG or WEBP. JPEG and BMP fill transparent areas with white, which shows up as a white box on a dark background.
- Screenshots: keep a PNG master when crisp text matters and export a WEBP copy for the web. Repeated lossy saves pile up halos around letters.
- Shrinking files: reduce the dimensions before lowering quality. Resizing a 4,000 px-wide photo to 1,600 px cuts the size sharply while keeping it sharp.
Frequently asked questions
Can I convert several images at once?
Yes. Select multiple files or drop them together and each gets its own card. You can set the format and size per card, press “Convert all” to process them in order, then “Download all” to save them in one go. There is no file-count limit, but large images use a lot of browser memory, so batches of a few dozen are safer.
Does converting reduce quality?
Saving as PNG is lossless, so the pixels are preserved exactly. JPEG and WEBP are lossy: fine detail shifts slightly depending on the quality setting, and at 85% the difference was hard to spot on screen. Re-saving a JPEG as JPEG stacks up losses, so keep PNG while editing and compress once at the end. Enlarging an image never adds detail that was not there.
Are my images stored on a server?
No. Images are never uploaded. When you choose a file the browser reads it, draws it on a Canvas in the page and re-encodes it, all on your own device. The images never reach our servers, so they cannot be stored or viewed there, and your work disappears from memory when the page closes.
Does it work on a phone?
Yes. It runs on phones and tablets with a recent Chrome, Edge or Safari, and you can pick images straight from the photo library. Browsers have less memory than a computer, so processing several very large photos at once may fail; convert them in smaller batches if that happens.