Compress Image Online
Shrink your photo's file size without losing visible quality. Compare before/after sizes in real time. Browser-side, no upload.
Drop a photo to start
JPG, PNG, WebP, HEIC up to 40 MB · stays in your browser
Never uploaded · 100% browser-side
How it works
- 1
Drop your photo
JPG, PNG, or WebP - up to 40 MB.
- 2
Pick a quality level
We default to 80% quality - typically a 60-80% size reduction with no visible loss. Slide for more or less.
- 3
Download the smaller file
Compare original vs compressed size side-by-side. Save the result when you're happy.
Why use this online tool
Real-time size comparison
See the original size, the compressed size, and the % saved as you adjust quality.
Privacy-first
Compression happens in your browser. The image is never uploaded to a server.
All major formats
JPG, PNG, WebP all supported as input and output. Switch formats while compressing for extra savings.
Free, unlimited
No signup, no watermark, no per-image limit.
When to use it
- Email attachments that exceed the 25 MB attachment cap
- Website performance - serving smaller images means faster load times
- Social media uploads on slow connections
- Cloud storage - cutting photo backup size by 60-80% adds up fast
- Sending photos over messaging apps that auto-compress badly
Frequently asked questions
- Will I notice the quality drop?
- At 80% quality (our default), most photos are visually identical to the original at 60-80% smaller. At 60% quality you may notice slight softening on solid colors and flat backgrounds. We recommend trying 80% first and lowering only if you need more savings.
- Why is the file so much smaller?
- JPEG and WebP are lossy formats - they discard imperceptible detail (especially in smooth gradients) to save space. The trick is dropping detail your eye can't see while keeping detail it can. Our default settings hit a quality/size balance that works for most photos.
- Can I compress PNGs too?
- Yes - PNGs convert to optimized PNG (lossless) or to WebP/JPG (lossy, much smaller). For photos, PNG → JPG often saves 80%+ with no visible difference.
- Is there a difference between compress and resize?
- Yes. Resize changes dimensions (1920×1080 → 800×450). Compress keeps dimensions but reduces file size by reducing per-pixel quality. Use both together for maximum savings on big photos.
- What's the highest compression I can apply?
- Down to 10% quality, but anything below 50% is rarely useful for photos - it introduces visible 'JPEG artefacts'. For very small target sizes, combine compression with resize.
- Does this work for HEIC photos from iPhone?
- Yes - drop a HEIC and the tool decodes it in-browser, then re-encodes to your chosen output format with the requested quality.
Related free tools
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Rotate 90° Clockwise
Drop a photo and rotate it 90 degrees clockwise instantly. Everything happens in your browser - your image never touches our servers.
Crop to Square (1:1)
Crop your photo to a perfect 1:1 square instantly. Choose what stays in frame with the draggable crop box. Browser-side, no upload.
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