Image Compressor

Local-first

Compress JPG, PNG, and WebP images locally with quality controls before uploading to websites or CMS tools.

What is Image Compressor?

Compress JPG, PNG, and WebP images locally with quality controls before uploading to websites or CMS tools.

Compress multiple images locally
Choose WebP, JPG, or PNG output
Adjust quality before downloading

How to use it

Select an image file that can be decoded by your browser.
Choose a target quality or output format and keep the original file available for comparison.
Compare the preview, file size, and visible detail before accepting the result.
Download the compressed copy only after checking text, edges, transparency, and color-sensitive areas.

Quick example

Example input

Large JPG, PNG, or WebP image

Expected output

Smaller image file with selected quality

Keep a source copy when compressing important product images.

Best use cases

Prepare website images, screenshots, product images, or phone photos.
Convert files before uploading to a CMS, blog, job page, or social platform.
Use it when privacy matters and the input should stay inside the browser.

Official standards and scope

The WHATWG canvas rules define browser-side bitmap serialization, MIME selection, and the quality hint. PNG support is required, while JPEG and WebP availability and quality interpretation depend on the browser; the W3C PNG specification defines the PNG file format itself.

WHATWG HTML Standard: HTMLCanvasElement.toBlob() - WHATWG
WHATWG HTML Standard: Serializing a bitmap as a file - WHATWG
Portable Network Graphics (PNG) Specification, Third Edition - World Wide Web Consortium (W3C)

Sources checked July 27, 2026. Standards can change; review the original sources again before formal integration or compliance decisions.

Notes

Browser support for JPG, PNG, WebP can affect preview and export behavior.
Large or batch files use more browser memory, so process them in smaller groups when needed.
Preview the result before using it in production, publishing, or submission workflows.

FAQ

Are my images uploaded?

No. Compression runs locally in your browser.

Which format should I choose?

WebP usually gives the smallest files. JPG is best for broad compatibility.

Is Image Compressor free to use?

Yes. You can use it directly in the browser without creating an account.

Does Image Compressor support batch processing?

Image tools with multi-file input can process multiple files. The exact behavior depends on the file picker shown on the page.

Are files or content uploaded?

Image Compressor runs in your browser, so your input or files are not uploaded to DataHub servers.

Can I use Image Compressor on mobile?

Yes, but desktop browsers are better for large files, batch conversion, or long text input.

Why can conversion or validation fail?

Common causes include corrupted files, unsupported browser codecs, very large files, or low memory.

Can I use the result commercially?

The tool only processes your own input. Commercial use depends on the rights of the original file or data.

Related tool guides

Image Format Tools Compress, resize, convert JPG, PNG, WebP, AVIF, and HEIC images, generate favicons, and remove image metadata locally before publishing.