Image Compressor
Compress JPG, PNG and WebP images in your browser to reduce file size without uploading them. See real before-and-after sizes and download the result.
How to use
- 1
Drag an image onto the upload area, or click and choose a file (JPG, PNG or WebP).
- 2
Move the quality slider - lower means a smaller file with more compression.
- 3
Choose an output format if you want to convert at the same time.
- 4
Compare the previews and size figures, then click Download.
How it works
Your image is decoded in memory, redrawn onto a canvas and re-encoded at the quality you choose. Modern canvas encoding produces smaller JPEG and WebP files because it applies a fresh, tuned compression pass and drops redundant metadata.
Frequently asked questions
Does the image leave my device?
No. The whole process runs inside your browser using the built-in canvas API.
What does the quality slider do?
Lower quality values discard more fine detail and produce smaller files. Values around 60-80 usually look indistinguishable from the original on normal screens.
Why may a PNG not shrink much?
PNG stores pixels losslessly. Re-encoding a PNG as JPEG or WebP is where the big savings come from; a lossless re-encode is limited to metadata cleanup.
Is the file saved anywhere?
No. Nothing is uploaded and nothing is stored on any server.
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