New free tool

Browser-Side Image Compressor with Size Comparison

Compress JPG, PNG, and WEBP images with quality, format, and optional max dimension controls. Processing is handled in the browser for this tool; avoid using sensitive images unless you have reviewed the implementation.

Browser-side processingBefore-after size comparisonWEBP, JPG, and PNG export

Ready to use

Browser-side · no account · results stay on this page

Use tool

Privacy note: This tool is marked browser-side in the tool registry. Selected images or pasted text are handled with browser-side file, canvas, or text APIs for this tool. No account is required for this public tool. Review data handling.

Free ToolBrowser-side processing

Image Compression Studio

Reduce file size with WEBP, JPG, or PNG export controls, optional downscaling, and before-after size feedback.

Drop image here or click to upload

Supported format: JPG / PNG / WEBP, max 15MB

No image uploaded

Mobile processing guidance

On mobile, start with a JPG/PNG/WebP under 10MB and enable dimension limits for very large photos.

File limit

Max 15MB and output under 36MP.

Low-memory risk

Large dimensions use browser canvas memory even when the file size is small.

Retry path

If compression fails, retry with WEBP/JPG, lower quality, or a 1600px/1200px dimension cap.

Compression Controls

Choose format and quality, then optionally cap dimensions for a smaller export.

Target preset

Pick a starting point for common upload and publishing jobs. You can fine-tune quality and dimensions after applying a preset.

Output format

Current output

1600 x 1600px

Quality82%

Format note

PNG may become larger after export because it is lossless. Transparent images keep transparency in PNG and WEBP, while JPG fills transparency with white.

Limit dimensions

Cap width and height without upscaling smaller images.

Max width

Max height

Browser-side compression

Compression is designed for browser-side processing with canvas based on the current public implementation. Avoid entering sensitive images unless you have reviewed the implementation.

Preview and output

Waiting for image

Choose an image to generate a compressed output.

Choose an image to see the compressed output preview.

Quick answer

An image compressor reduces file size by changing format, quality, dimensions, or a combination of all three.

This browser tool includes target presets, then shows original size, compressed size, and file-size change before you download.

Best inputs for compression

Use large web images

Photos, screenshots, and social images often shrink well when exported as WEBP or JPG.

Choose intent before format

Use WEBP for web delivery, JPG for compatibility, and PNG when transparency or lossless output matters.

Target modes

Pick the compression target before tuning quality

The tool presets are starting points for common publishing jobs. Apply one, then adjust quality, format, or dimensions if the preview shows artifacts or the output is still too large.

Web image

Start with WEBP, 82 percent quality, and a 1600 px cap for blog images, landing-page visuals, docs screenshots, and knowledge-base graphics.

Email attachment

Use JPG at a lower quality and a 1200 px cap when the goal is a small file that opens reliably in mail clients and support systems.

Avatar

Use a smaller 800 px cap for profile photos, community icons, author headshots, and account images that will render in compact spaces.

E-commerce

Keep a higher quality JPG and a 2000 px cap when product detail, edges, labels, and zoom previews matter more than the smallest possible file.

Social upload

Use WEBP with a 1200 px cap for social posts, thumbnails, and preview images, then check text and edges at mobile size before publishing.

Best-fit workflows

Compression is most helpful when image file size affects upload, delivery, or page speed.

Website images and blogs

Export WEBP or JPG files that are lighter for articles, landing pages, and documentation.

Marketplace uploads

Reduce large product photos before uploading to platforms that limit file size.

Email and support attachments

Compress screenshots and photos when you need smaller attachments without opening a design app.

Compression tips that help

Format and dimension choices matter as much as quality.

Try WEBP first for web images, then use JPG if the destination does not support WEBP.

Lower quality gradually. A small move from 90 to 82 can reduce size without obvious visual loss.

If the source is huge, set a max dimension before compressing. Fewer pixels usually means smaller files.

Compress vs resize vs convert

Choose the right image operation

Compress

Choose compression when the image already has the right frame and dimensions, but the file is too large for page speed, upload limits, or sharing.

Resize

Choose resizing when the pixel dimensions are larger than the final display size. Fewer pixels usually reduce file size before quality changes.

Convert

Choose conversion when the destination needs a different format, such as WEBP for web delivery, JPG for compatibility, or PNG for transparency.

Example

Upload a 3.8 MB JPG, export WEBP at 82 percent quality, enable a 1600 px max dimension if the image is large, then download the smaller file.

Assumption

The browser can decode the source image and encode the selected output format. WEBP support depends on the browser.

Limitation

Canvas export may remove metadata, PNG may not shrink, very large images can stress browser memory, and very low quality settings can create visible artifacts.

Common mistakes to avoid

These checks help prevent bad outputs, failed exports, and confusing results.

Compressing PNG as PNG

PNG export is lossless, so it may stay large or even grow. Use WEBP or JPG when file size matters more than transparency.

Leaving oversized dimensions

Quality changes help, but a 4000 px image still carries many pixels. Cap dimensions before export when the image will be displayed smaller.

Dropping quality too far

Very low quality can create blocky artifacts and muddy text. Compare the preview before downloading final assets.

Guides and examples

Use this tool in a real workflow

Image Compressor guide

Reference for formats, quality controls, transparency limits, and common compression errors.

Open resource

Image compression tradeoffs

A practical guide to balancing image size, quality, format, and browser limits.

Open resource

Media publishing workflow

A pillar guide for preparing images, videos, thumbnails, and Markdown cards before publishing.

Open resource

Frequently asked questions

How is the image processed?

The current public implementation is designed to decode, compress, and export the image in the browser. Avoid using sensitive images unless you have reviewed the implementation.

Which image formats are supported?

The tool accepts JPG, PNG, and WEBP images and can export compressed results as WEBP, JPG, or PNG.

Which format should I choose?

WEBP is often the smallest option for web use, JPG is widely compatible, and PNG is best for lossless graphics or transparency.

Why did my PNG become larger?

PNG export is lossless and browser canvas encoding may not beat the original optimizer. Try WEBP or JPG when file size is the priority.

Can I reduce dimensions while compressing?

Yes. Enable the max dimension controls to cap width and height. The tool downscales larger images and does not upscale smaller images.

How is the image processed?

The current public implementation is designed to decode, compress, and export the image in the browser. Avoid using sensitive images unless you have reviewed the implementation.