Reduce Image File Size Free
Automatically compress and optimize any image for the smallest possible file size with no visible quality loss.
When you just want a photo to be smaller — for emailing, uploading, or saving storage — choosing the right format and compression settings is more impactful than any single trick. ImageFixer's "reduce image size" mode looks at your input and figures out the smallest possible output that still looks good, automatically. You drop in the file, and we hand back a much smaller copy.
Drop an image or click to upload
HEIC, AVIF, WebP, PNG, JPG supported · Max 50MB
About this conversion
How automatic optimization works
ImageFixer analyzes the image's dimensions, color depth, and content type. For most photographs, the smallest output format is AVIF at a tuned quality level — typically yielding a file 70 to 90% smaller than the original. For graphics or screenshots, the recommendation may be different. We pick the format that gives you the smallest file with no visible loss.
How small is "small enough"?
There is a point of diminishing returns where pushing compression further starts to introduce visible artifacts. ImageFixer stops short of that point by default — you get the maximum size reduction that still looks identical to the original at normal viewing distance. If you need to push smaller, the Pro tier exposes finer-grained quality controls.
When format restrictions matter
Sometimes you need a specific format even if it is not the smallest possible. If you are emailing the image to a non-technical user, JPG is safer than AVIF. If you are uploading to a CMS that only accepts JPG and PNG, AVIF is not an option. ImageFixer lets you override the format choice when the destination has constraints.
Resize plus compress
For maximum size reduction, combine compression with a smaller resolution. A photo intended for a 1080-pixel-wide social post does not need to be 6000 pixels wide. ImageFixer's resize panel lets you drop the dimensions to a sensible size before encoding, which compounds the savings.
Frequently asked questions
Is this free to use?
Yes. Single-image conversion is free with no signup required. Pro unlocks batch processing and more.
Are my files private?
Completely. All processing happens in your browser — no file is ever sent to a server.
What formats are supported?
HEIC, HEIF, AVIF, WebP, PNG, and JPG are all supported as input and output formats.