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Image Compressor & Converter
Make JPG, PNG and WebP files smaller, or convert between PNG, JPG and WebP, one image or a whole batch.
Free tools that run in your browser. Nothing you type, open or create is uploaded to NerdBible or anyone else.
Choose one or more images to start. Nothing is uploaded.
Same format compresses each image and keeps its type. Choose JPG, PNG or WebP to convert every image to that format instead. Up to 50 images at a time.
How to use it
- Choose or drop one or more images.
- Keep Same format to make the files smaller, or choose JPG, PNG or WebP to convert them.
- Set the quality (70 to 80 suits photos) and, if you like, a max width: large photos shrink, smaller ones are never enlarged. For JPG, pick the colour that fills transparent areas; for SVG files, the width of the picture.
- Check the result for each file and download them one by one or all together.
Questions
Are my images uploaded to a server?
No. Every image is compressed or converted by your browser on your device. You can disconnect from the internet after the page loads and it still works.
PNG, JPG or WebP: which should I use?
JPG suits photos and is understood everywhere. PNG keeps sharp edges and transparency, so it suits logos and screenshots. WebP does both and makes smaller files, and every current browser shows it.
Why did my PNG barely shrink?
PNG is lossless, so the quality slider cannot make it smaller. For photos, save as WebP or JPG instead: the file is usually many times smaller and looks the same.
What happens to transparency when I convert to JPG?
JPG cannot store transparency, so clear areas are filled with the background colour you choose, white by default. PNG and WebP keep transparency.
Is the location and camera data kept?
No. The new copy is redrawn from the pixels, so EXIF data such as GPS position and camera model is not carried over.
Can I convert an animated GIF?
Only the first frame is converted. This tool makes still images.
About this tool
About the image compressor and converter
Large images slow down websites, fill up inboxes and get rejected by upload forms. This tool makes them smaller and, when you need it, changes their format, for one picture or a whole folder at once.
Compressing
- Pick the output format and a quality. 70 to 80 is a good balance for photos: the file shrinks a lot and the difference is hard to see.
- Set a maximum width to shrink oversized photos as well. A phone photo cut to 1600 or 2000 pixels wide drops sharply in size. Smaller images are never enlarged.
- Each file shows how much it saved before you download it.
Converting
Switch between PNG, JPG and WebP. JPG suits photos and opens everywhere. PNG keeps sharp edges and transparency, which suits logos and screenshots. WebP does both with smaller files and works in every current browser. Converting to JPG fills transparent areas with a colour you choose.
Why a PNG barely shrinks
PNG is lossless, so the quality slider cannot reduce it. For photos, converting to WebP or JPG usually makes the file many times smaller.
Compressed copies are redrawn from the pixels, so location and camera data are not carried over. Every image is processed by your browser on your device; nothing is uploaded, and it keeps working offline once the page has loaded.
Related tools
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- HEIC to JPGTurn iPhone photos into JPG or PNG.
- SVG OptimizerStrip editor clutter from SVG files.
- Compress PDFMake a PDF smaller by lowering its image quality.
- Photo Metadata Viewer & RemoverSee every metadata entry, and strip location or all camera data from a photo before you share it.