Compress Images
Reduce image file sizes using the same encoders professional tools rely on, with the result shown against the original before you download it.
Drop your images here
or click to browse your files
Up to 200 files at a time, 200 MB per file. These limits protect your browser from running out of memory, they are not commercial restrictions.
This image is being read and converted by your own browser. It is never uploaded.
How to compress an image
Step 1: Add the images you want to make smaller.
Step 2: Choose an output format. WebP and AVIF usually give the biggest reduction; JPEG is the safest for compatibility.
Step 3: Lower the quality until the size is where you want it. The comparison shows the original beside the result.
Step 4: Download the compressed file, or all of them as a ZIP.
What actually makes a file smaller
Three things: choosing a more efficient format, lowering the quality, and reducing the dimensions. This tool offers all three, and shows what each one costs.
Changing format is usually the biggest win and the cheapest in visible quality. A JPEG photograph re-encoded as WebP at the same quality is typically a third smaller.
Lowering quality is the direct trade. Below about 70 the artefacts become visible in flat areas and around sharp edges; between 75 and 85 most photographs hold up well.
Reducing dimensions is the one people forget. An image displayed at 800 pixels wide gains nothing from being 4000 pixels wide, and shrinking it saves far more than any quality setting.
Questions
Which format compresses best?
For photographs, AVIF is usually smallest, then WebP, then JPEG. AVIF encoding is much slower and downloads a larger codec. For graphics with flat colour and transparency, lossless WebP or an optimised PNG is often better than any lossy format.
Does compressing twice make it smaller again?
Not usefully. Re-encoding an already lossy image discards more detail without saving much space. Compress once, from the best original you have.
Can I compress without losing any quality?
Yes, with a lossless format. PNG is always lossless, and WebP has a lossless mode. Optimising a PNG can shrink it noticeably while keeping every pixel identical.
Is there a limit on how many files I can compress?
No commercial limit. Files are processed a few at a time to stay within your device’s memory, and very large images are flagged beforehand.