QuireFree image tool
Compress JPG, PNG and WebP images in your browser
This tool makes JPG, PNG and WebP files smaller. You can change the format, set the quality and shrink large images to a maximum width or height. It shows the size before and after for each file.
Your images never leave your browser. They are compressed on your device and nothing is uploaded.
Drop files here, or
JPG, PNG and WebP. Up to 100 files at a time, 50 MB each.
How it works
Choose an output format. "Same as the original" keeps each file's format.
Set the quality for JPG and WebP. Lower numbers give smaller files.
To make images smaller in pixels, enter a maximum width or height. The tool keeps the proportions and never enlarges an image.
Choose your images, or drop them anywhere on the page. Each row shows the size before and after.
If a file came out larger than the original, the row says so and lets you keep the original. Download files one by one, or all of them as a ZIP file.
Your browser decodes and resizes the images in a background worker. The tool writes JPG files with MozJPEG, compiled to WebAssembly. On one test image it made files about 30% smaller than the browser's built-in JPG encoder at the same quality setting, with slightly higher measured quality. On a very grainy test image the two came out about even. MozJPEG is slower: about 1 to 3 seconds for a 12-megapixel photo. WebP files use the browser's own encoder. For PNG, the browser writes the file and then OxiPNG optimizes it without changing any pixels. On a 12-megapixel test photo that took the file from 18.5 MB to 13.3 MB in about 9 seconds.
Questions
What it does and what it does not
Privacy, metadata, file limits and browser support.
Are my images uploaded?
No. The page and its encoders load from quireapps.com, and after that each image is read, compressed and saved inside your browser tab. There is no analytics or tracking on this page. You can check this in your browser's developer tools, on the Network tab: compressing an image makes no requests.
Why did a file get larger?
This happens when the original was already compressed hard, when the quality setting is higher than the original's, or when you convert to a format that suits the image less, such as a photo saved as PNG. The tool marks these files and offers to keep the original instead, and the ZIP then contains the original file.
What happens to the metadata?
All metadata is removed, including the EXIF location, the camera details and the date taken. The EXIF orientation is applied to the pixels first, so the image keeps the way it was displayed. Colors are converted to sRGB and no color profile is written. If you need to keep the metadata, this tool is not the right one.
How do I make a PNG smaller?
PNG is lossless, so the quality setting does not apply. OxiPNG makes PNG files smaller without changing a pixel. For a bigger reduction, set a maximum width or height, or convert to WebP or JPG. JPG has no transparency, so transparent areas become white.
Are there limits?
Each file can be up to 50 MB and 100 megapixels, and the list holds up to 100 files at a time. Safari on iPhone and iPad limits images to about 16.7 megapixels for this kind of processing, so larger images can fail there; setting a maximum width or height avoids that. Animated GIF, WebP and PNG files become still images. Files are compressed one at a time, and PNG optimization can take several seconds for a large photo.
Which browsers does it work in?
It is tested in Chrome. Current versions of Edge, Firefox and Safari should also work, but they have had less testing here. Safari cannot create WebP files, so in Safari choose JPG or PNG; the tool shows an error if WebP is not available.
Is it free?
Yes. There is no account, no sign-up, no watermark and no daily limit.