7 tools
Image converters that run on your own device
Format conversion and compression both happen in the page, using the same image decoders your browser already uses to display pictures. Your photos are read locally and never uploaded.
7
Tools in this category, all free
0 bytes
Uploaded — there is no server to send to
No
Account, watermark or daily limit
- Compress ImageShrink JPG, PNG and WebP files with quality and size controls.
- JPG to PNGConvert JPG photos to the lossless PNG format.
- PNG to JPGConvert PNG images to smaller JPG files with adjustable quality.
- WebP to PNGConvert modern WebP images into widely-supported PNG files.
- WebP to JPGConvert WebP images into universally-supported JPG files.
- HEIC to JPGConvert iPhone HEIC/HEIF photos into standard JPG images.
- Image to Base64Encode an image as a Base64 data URI you can paste into CSS or HTML.
About these tools
Most image conversion is a question of which format the thing receiving the image will accept. HEIC is what an iPhone shoots by default and what a great many websites, printers and older applications refuse. WebP is what a modern site serves and what some desktop software still cannot open. PNG keeps every pixel and an alpha channel, which is what you want for a logo, a screenshot or anything with sharp text. JPG throws detail away in exchange for a much smaller file, which is what you want for a photograph.
Compression is where the numbers usually get exaggerated. The compressor here reports the actual before and after size of your specific file rather than a claimed average, because how much a picture can be shrunk depends almost entirely on what is in it: a photograph of a busy street has far more to discard than a flat-coloured diagram, and a small file may not shrink at all.
If you are preparing photographs for a marketplace listing, check the destination’s own rules before converting — minimum dimensions and maximum file sizes vary by platform, and an image that fails them is a listing that does not go live.
Frequently asked questions
No. Each image is decoded and re-encoded by your own browser, and the result is handed straight back to you as a download. Nothing is transmitted, so a photograph of a document or an ID is as safe here as it is in your own photo library.
It depends on the direction. Anything to PNG is lossless. Anything to JPG or WebP with a quality setting below 100 discards detail, permanently and by design. Converting a JPG to PNG cannot recover what the JPG already threw away — it only stops any further loss.
Yes. The converters accept a batch and handle each file independently, so one unreadable image reports its own problem instead of failing the whole run.
The rest of the toolbox
Every category works the same way — the file or the text stays on your device.