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Improve image quality online — free

Free online image quality enhancer. Clean up compression artifacts, restore sharpness and re-encode at high quality — JPG, PNG, WebP, AVIF and more.

⚙️ Operation parameters

What does improving image quality do?

Quality improvement re-encodes your image with an efficient encoder, applies optional light denoising to hide compression blockiness and adds adaptive sharpening. A heavily compressed photo usually looks visibly cleaner after this treatment.

Important: no tool can restore detail that was never recorded — pixels cropped out or lost in a previous lossy encode cannot be recovered. For the best result, start from the largest original file you have.

How to improve image quality?

1. Upload a file — drag and drop a file or select it via the file picker.

2. Convert — adjust quality if needed and click "Process".

3. Download — get the converted file instantly.

How to get a file of a specific size?

You can set a maximum file size in KB. The tool then picks the highest quality that still fits your budget, using an automatic binary search over the quality setting. Leave the field empty to keep maximum quality.

Related operations

Improve WebP quality Re-encode or upscale your WebP file Upscale image Increase resolution by 2x, 4x or 8x WebP to AVIF Convert WebP to AVIF online free PNG to AVIF Convert PNG to AVIF online free

❓ Frequently Asked Questions

Is it free?
Yes, conversion is completely free with no limits.
Are my files safe?
Yes. Files are automatically deleted right after conversion and download.
How many files can I upload?
Up to 3 files at a time.
Does upscaling add real detail?
No. Enlarging an image reconstructs plausible pixels, it does not recover true detail. Quality improvement without changing the size is the honest way to make a compressed photo look better.
How much quality can I choose?
You control quality (1–100), sharpening strength and optional denoising, or set a target file size in KB.