Browser-only image tool
Reduce Image Size Without Losing Quality
Shrink your image file size with no visible quality loss. Near-lossless compression at 80–90% quality is indistinguishable from the original — and WebP format reduces size by an additional 25–35% compared to JPG. No upload, no signup.
Upload your image, set a target size or quality level, and download the optimized file. Open the compress tool →
Lossless vs near-lossless: what actually works
True lossless compression stores every pixel exactly — but it can only reduce PNG file sizes by 10–30%, and it cannot reduce JPG size at all without re-encoding. Near-lossless compression at 80–90% quality is the practical sweet spot: human eyes cannot reliably distinguish a JPG or WebP at 85% quality from the original at normal viewing sizes. This approach typically cuts file sizes by 50–80% with no perceptible quality difference.
WebP is the most efficient option. At equivalent visual quality, WebP is 25–35% smaller than JPG and up to 50% smaller than PNG. If your target platform supports WebP (all modern browsers do), converting and compressing to WebP delivers the best quality-to-size ratio.
Perfect for...
- Web performance optimization — reducing image weight to improve page load speed and Core Web Vitals scores
- Sharing photos via email or messaging apps without visible degradation for the recipient
- Archiving large photo libraries at a smaller size that still looks identical on screen
How it works (3 steps)
- Upload your image. JPG, PNG, or WebP — the file stays in your browser, never sent to any server.
- Set your target. Either pick a target file size in KB, or set a quality level (80–90% is the near-lossless range). Choose WebP output for maximum size reduction.
- Download and compare. View the original and compressed side-by-side before deciding. For most images at 85% quality, the difference is invisible.
Tips for reducing size without visible quality loss
- Use 80–90% quality as your target range — below 75%, JPG compression artifacts become visible on photos with smooth gradients and skin tones.
- Convert to WebP for the biggest savings — if your use case allows WebP, converting from JPG to WebP at 85% quality can reduce file size by 40–60% with no perceptible difference.
- PNG compression is limited — if a PNG will not compress below a certain size, it is because PNG is already lossless. Convert to WebP or JPG to achieve meaningful size reduction.
- Resize to display dimensions — if a 4000 px wide image is displayed at 1200 px on your website, resize it to 1200 px first. Smaller dimensions mean smaller file size at the same quality setting.
FAQ
Is it really possible to compress an image without any quality loss?
True lossless compression (PNG) removes no pixel data but only saves 10–30%. Near-lossless at 85–90% quality is visually indistinguishable from the original for most photos and produces 50–80% smaller files. This is the practical standard for web and email use.
What format preserves quality best while reducing file size?
WebP is the most efficient — 25–35% smaller than JPG and up to 50% smaller than PNG at equivalent quality. For broad compatibility, JPG at 85–90% quality is the next best option. Use PNG only when transparency or lossless accuracy is required.
How much can I reduce an image size without visible quality loss?
For typical photographs, you can reduce file size by 60–80% before quality loss becomes noticeable. JPG or WebP at 80% quality is visually indistinguishable from the original for most photos and use cases.
What is the difference between resizing and compressing an image?
Resizing reduces pixel dimensions (and therefore total data). Compressing reduces encoding efficiency without changing dimensions. For "reduce size without losing quality", compression is preferable — it preserves all the pixel detail while making the file smaller.
Why does a PNG sometimes get bigger after compression?
PNG is already lossless — if it is well-compressed, re-encoding it may add overhead and produce a slightly larger file. Converting to WebP is the best solution for PNGs that cannot be compressed further in PNG format.