Is my image uploaded to a server?

No. This tool runs entirely in your browser using the HTML5 Canvas API. Your images are never sent to any server — they are processed locally on your device. You can even use it offline after the page has loaded.

What is the difference between JPEG, PNG, and WebP?

JPEG is best for photos — it compresses well but loses some detail. PNG is lossless and best for graphics, logos, and screenshots where sharpness matters. WebP is a modern format that achieves smaller file sizes than both JPEG and PNG with comparable quality. Use WebP for web images to improve page load speed.

Does compression affect image quality?

For JPEG and WebP, you control the quality with a slider (1–100). Lower values mean smaller files but more visible compression. PNG output is always lossless — there is no quality loss. The default quality of 80 is a good balance between size and quality for most uses.

Can I compress multiple images at once?

Yes. Drop multiple images at once or select multiple files using the file picker. Each image is processed and displayed as a result card. When you have two or more results, the Download All as ZIP button becomes available.

What image formats are supported?

You can compress and convert JPEG, PNG, WebP, GIF, BMP, and any other format your browser can decode via the Canvas API. Output format is JPEG, PNG, or WebP — your choice.

Free Image Compressor — Compress JPEG, PNG & WebP Online

Output Format

Quality

Image quality

Smaller file, lower qualityLarger file, best quality

PNG is lossless — quality does not apply. All PNG output is pixel-perfect.

Resize (max dimensions)

Max Width (px)

Max Height (px)

Output Filename Suffix

No upload No account Files stay on device

Drop images here

JPEG, PNG, WebP, GIF and more — multiple files supported
Or paste an image with Ctrl + V

0 images

How it works

Drop images

Drag & drop, paste from clipboard, or pick files

Adjust settings

Choose format, quality, and optional max dimensions

Download

Save individual files or batch download as a ZIP

Format guide

JPEG

TypeLossy

Best forPhotos

TransparencyNo

File sizeSmall

PNG

TypeLossless

Best forGraphics, UI

TransparencyYes

File sizeLarger

WebP

TypeLossy/Lossless

Best forWeb images

TransparencyYes

File sizeSmallest

Frequently asked questions

Does compression reduce image quality?

For JPEG and WebP, yes — compression is lossy, so very low quality settings will show artefacts. The default quality of 80% gives a good balance between file size and visual quality. PNG is always lossless regardless of the quality slider.

Are my images uploaded to a server?

No. All compression happens entirely in your browser using the HTML5 Canvas API. Your images never leave your device — there is no server involved at any point.

What's the best format for web images?

WebP generally produces the smallest files while supporting both transparency and good quality. Use JPEG for photos without transparency, PNG for graphics, logos, or screenshots where lossless quality matters, and WebP when broad browser support isn't a concern.

Why is my PNG output larger than the original?

PNG uses lossless compression, so the canvas re-encoding may produce a larger file than the original if the original was already highly optimised. Try switching the output format to WebP or JPEG for a smaller result.

Is there a file size or batch limit?

There is no hard limit — the only constraint is your device's available RAM. Very large files (20 MB+) or large batches may slow down on lower-end devices. The ZIP download works for any number of results.

Compress Images Online Free — No Upload, No Account

How it works

Format guide

Frequently asked questions

Bulk Image Compression

Convert to WebP Free

Compress JPEG & PNG Online

Download as ZIP