Image Compressor
Compress PNG, JPEG, and WebP images with a live quality slider and side-by-side preview. Runs in your browser — your photos never leave your device.
Drop a PNG, JPEG, or WebP here.
Oron your computer. Up to 50 MB.
Your image never leaves your device.
Compression runs in your browser via the native Canvas API. No upload, no signup — safe for personal photos, sensitive design comps, and anything else you wouldn’t hand to a random site.
How to use it
- 1Drop an image into the upload zone, or click to browse for one. Up to 50 MB; PNG, JPEG, WebP, GIF, and BMP all work.
- 2Pick an output format: WebP (best modern compression), JPEG (broadest compatibility), or PNG (lossless).
- 3Drag the Quality slider — 75 is a safe default for WebP and JPEG. PNG ignores quality since the format is lossless.
- 4Optional: set a Max dimension to resize the longest side (in pixels). Useful for shrinking high-res phone photos down to web sizes.
- 5Compare before/after side-by-side, then click Download to save the compressed file.
Common use cases
- Shrink phone photos before uploading them to a website or sharing in chat.
- Convert legacy PNGs and JPEGs to WebP for a 20–35% file-size win without visible quality loss.
- Resize and compress hero images so a landing page actually loads fast.
- Strip metadata and bloat from images exported by Photoshop, Figma, or screenshot tools.
- Hit a CMS or app file-size cap ("images must be under 2 MB") without opening a desktop editor.
Frequently asked questions
- Are my images uploaded anywhere?
- No. Compression uses the browser's native Canvas API and runs entirely on your device. Safe for personal photos, NDA design comps, screenshots with sensitive data — nothing is sent to a server.
- Which format should I pick?
- WebP if the consumers are modern browsers (basically all of them today) — best compression for the same visual quality. JPEG when you need maximum compatibility (email attachments, old software). PNG when you need transparency or a lossless save.
- What does the quality slider do?
- It controls the lossy compression strength for JPEG and WebP. 100 is the largest file with the least loss; 1 is the smallest with the most. The 70–80 range is the typical sweet spot — visually indistinguishable in most cases at half the file size.
- Why is PNG quality disabled?
- PNG is a lossless format — the quality slider has no effect. To shrink a PNG, you mostly need to either resize it or convert it to WebP / JPEG.
- What if compression makes the file bigger?
- Possible — a small PNG with limited colors can re-encode larger as JPEG with lots of detail. The Reduction stat goes negative and is tinted amber so you notice. Try a different format, lower quality, or a smaller max dimension.
- Why does my JPEG have a white background after compressing a PNG?
- JPEG doesn't support transparency. When converting from a PNG with an alpha channel to JPEG, the transparent areas become white. Use WebP or stick with PNG if you need transparency.
- Is there a file-size limit?
- 50 MB on the input. Larger images would slow your browser enough to feel broken. For raw photos and design comps, 50 MB is plenty of headroom.
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