Image Compressor

Shrink JPG, PNG and WEBP file size right in your browser — pick a quality level or a target KB, download instantly.

Runs in your browser. Nothing is uploaded.

Drag & drop images here, or click to browse

JPG, PNG, WEBP · up to 100MB per file · multiple files allowed

Compression mode

Quality — 80%

How to use

Compress an image in 3 steps

Add your images

Drag one or more JPG, PNG or WEBP files onto the drop zone, or click it to browse your device. Nothing leaves your browser.

Choose quality or target size

Use the quality slider for a quick reduction, or switch to Target size mode and type the exact KB you need — handy for exam forms and portals with strict upload limits.

Compress and download

Click Compress. Each image gets its own before/after size and a Download button, so you can save one file or all of them.

Features

Why use this Image Compressor

Batch-compress JPG, PNG and WEBP files up to 100 MB each; large batches may be slow on a phone.

Target-KB mode tries to fit a size limit; verify the downloaded file before uploading it.

See the exact before/after size and percentage saved for every file.

Nothing is uploaded — compression runs entirely in your browser via WebAssembly.

FAQ

Questions about this tool

Does compressing an image reduce its dimensions?

No, by default the width and height stay exactly the same — only the file size shrinks. Compression works by reducing how much data is used to store the same pixel grid, mainly through smarter JPEG/WEBP encoding, not by shrinking the picture.

What is the difference between Quality mode and Target size mode?

Quality mode lets you pick a compression strength directly (higher keeps more detail, lower gives a smaller file). Target size mode does the opposite: you tell it the KB you need — for example for a government form upload limit — and it attempts to reduce the output to that size. Always check the downloaded file; the target cannot be guaranteed for every image.

Can I compress PNG files, or only JPG?

Both, plus WEBP. PNG compression is lossless-leaning and tends to save less than JPG on photos, but works well on screenshots and graphics. For maximum size reduction on a photo, converting to JPG or WEBP first usually helps.

Is there a limit to how many images I can compress?

Files are processed one after another, but each file is limited to 100 MB and large batches can exhaust a phone’s memory. Try a smaller batch if processing stalls.

Practical example

See How to prepare an image for a size-limited form for a worked example and the checks to make before using your result.