How to use the Image Compressor
- Add your images
- Pick JPG or WebP and a quality value (60 is a good start)
- Click Convert and compare the new file size
About this tool
Large photos slow down websites and fill up email limits. This compressor re-encodes your image at a lower quality setting, which can reduce the file size a lot, often with little visible difference. A quality value between 60 and 80 works well for most photos.
How image compression works
JPG and WebP are lossy formats. When the quality value is lowered, the encoder throws away fine detail that the eye notices least and stores the rest more efficiently. The lower the value, the smaller the file and the more detail is lost. Because the change is made to a new copy, your original file stays untouched.
Choosing a quality level
- 80–90: very close to the original for most photos, with a moderate saving.
- 60–75: a strong balance of size and quality, good for websites and email.
- Below 50: visible blocks and blur appear, so use it only when size matters more than appearance.
Tips for smaller files
- Resize very large photos first with the Image Resizer. A 4000 px photo shown at 800 px wide wastes bytes.
- Choose WebP instead of JPG for websites when you can, since it is often smaller at similar quality.
- Keep screenshots with text and logos as PNG, because heavy lossy compression makes text look fuzzy.
- If an image is already small and compressed, re-compressing may save little or even make it larger.
Why image size matters for websites
Large images are one of the most common reasons pages load slowly, especially on mobile connections. Smaller image files help pages load faster and use less data for visitors.
Privacy and limits
Files are processed inside your browser and are not uploaded to FormatVolt. Each file can be up to 50 MB. Very large images or PDFs can fail on devices with little memory, so try a smaller file or a desktop browser if that happens.
Frequently asked questions
Is it really free?
Yes. There are no limits, watermarks or sign-ups.
Are my files uploaded anywhere?
No. The conversion runs inside your browser, so your files never leave your device.
How much smaller will my image be?
It depends on the photo. Large camera photos often shrink by half or more at quality 60–75, while images that are already small save less.
Will compression reduce quality?
Slightly. JPG and WebP are lossy formats, so lower quality values trade detail for size.
Does compression remove camera and location data?
Yes. The compressed copy does not include EXIF metadata such as camera model or GPS location.
Which is better for compression, JPG or WebP?
WebP is often smaller at similar visual quality, while JPG is accepted by more older apps. Try both and compare the sizes.
More free tools
Last updated: November 6, 2026