Media
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Every media tool in tabbed view
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Image Tools
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Image Quality Editor
About this tool
Re-encode any image as JPG or WebP at a chosen quality from 1 to 100. Drag the slider and watch the file size — and visible quality — change live in the side-by-side preview. Browser-only: your photo never leaves your device. Useful for shrinking screenshots, photos for the web, and anything else you need to compress while keeping a visible quality target.
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Formula
JPG quality (0.01–1) maps to libjpeg-style chroma + luma quantization tables
WebP quality (0.01–1) maps to lossy WebP at the chosen bitrate target
Output dimensions = input dimensions (no resampling). Use Image Tools to resize.
Source format → JPG: transparent backgrounds are flattened to white
How to use
- 1 Pick any image (PNG, JPG, WebP, GIF first frame, BMP, etc.).
- 2 Pick output format: JPG (smallest, no transparency) or WebP (smaller still, supports transparency).
- 3 Drag the quality slider — preview and file-size update live.
- 4 Click Download when you are happy with the size/quality trade-off.
Examples
| 10 MB photo at q=80 (JPG) | ~1 MB · negligible visible loss |
| Same photo at q=50 | ~400 KB · slight chroma noise on close inspection |
| Same photo at q=95 | ~3 MB · indistinguishable from original |
| PNG screenshot → WebP q=85 | 70–90% smaller, same crispness |
Frequently asked questions
For photos: 75–85 is the sweet spot. Below 60 you start seeing JPEG artifacts in skies and gradients. Above 90 file size grows fast for almost no visible gain.
WebP's perceptual encoder is more efficient than JPG's. At a given quality target, WebP files are typically 25–35% smaller than JPG with no visible difference. Modern browsers all support WebP.
If the original was already heavily compressed (say q=60), re-encoding at q=80 actually adds bytes without recovering any of the lost quality. Pick q lower than the original encoder used. The original's quality is opaque, but a 10× higher file size = a higher original quality.
No, dimensions are preserved exactly. To downscale or upscale use the Image Tools resizer.
JPG does not support transparency. Pick WebP if you need to keep alpha, or use Image Tools to keep PNG.
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