Image Compressor
Compress and convert between WebP, JPEG, PNG, AVIF and JXL locally in your browser. Files never leave your device.
Runs locally in your browser with @jsquash (MozJPEG / libwebp / Rust PNG / libavif / libjxl, Apache-2.0). Your image is never uploaded. Metadata (EXIF) is dropped during processing. JXL output may not preview in all browsers — download it to view.
About this tool
Five formats, one place
Convert between WebP, JPEG, PNG, AVIF and JPEG XL without leaving this page. Each file is decoded and re-encoded locally by WebAssembly codecs served from this site, so you can choose an output format that fits where the image will be used.
Your files stay on your device
There is no upload endpoint and no account. Images are opened from your disk, processed in the browser, and the result is downloaded from a local object URL. Closing the tab discards both the original and the converted copy.
Choosing an output format
WebP is a practical default for web pages. AVIF and JPEG XL can produce smaller files but take longer to encode. PNG is lossless and keeps transparency. JPEG remains the safest choice when the image will be opened by older software.
Frequently asked questions
Does compressing an image cost anything or require an account?
No. There is no signup, no per-file charge and no quota. Very large images simply take longer, because encoding runs on your own device.
Are my images uploaded to a server?
No. Both decoding and encoding happen in your browser; the tool never sends the image data anywhere.
Why is AVIF or JPEG XL slower than WebP?
Those encoders are more computationally expensive, and this site runs the single-threaded WebAssembly builds. WebP or JPEG is faster when you are converting a large batch.
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