How to reduce JPEG file size?
Reduce JPEG weight while preserving quality. Complete guide to JPEG compression and optimization.
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JPEG is the most common format for photos, but files can become very heavy. Knowing how to reduce their size is essential for web sharing.
discover the techniques to reduce JPEG weight while preserving the best possible visual quality.
Our tool allows you to compress your JPEG images directly in your browser, visible to the eye.
Table of contents
Understanding JPEG compression
JPEG uses lossy compression: some data is discarded to reduce weight.
Compression quality is expressed as a percentage: 100% = no compression, 0% = maximum compression.
At 80-85%, quality loss is invisible to the naked eye but weight is divided by 3 to 5.
JPEG optimization techniques
Reduce image dimensions to display size.
Use appropriate compression (80-85% for web).
Remove unnecessary EXIF metadata.
When to avoid JPEG?
JPEG doesn't support transparency (use PNG or WebP).
JPEG degrades with each re-save (work from original).
For graphics with text, PNG is often better.
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How to do it in 3 steps
Upload your JPEG image.
Adjust compression quality (80-85% recommended).
Download your optimized image.
Pro tips
- Keep an original version.
- Test several quality settings.
- Use WebP when possible.
- Choose a descriptive file name.
Common mistakes to avoid
- ✗Compressing an already compressed JPEG (cumulative degradation).
- ✗Using 100% quality (no benefit, heavy file).
- ✗Compressing too much (visible quality loss).
Frequently asked questions
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