Zoven

Image Compressor

Compress images to reduce file size without quality loss

What is the Image Compressor?

The image compressor works like this: it re-encodes images to JPEG/WebP at chosen quality with live size preview, batch mode and optional resizing - all in-browser. Everything happens on your device - the input never leaves your tab unless the tool clearly states it performs a server-side lookup.

How to use the Image Compressor

1. Select or drop your image.
2. Adjust the available settings while watching the preview.
3. Check dimensions, quality and format before exporting.
4. Download the result and keep the original when quality matters.

Features

• Runs on your device via the Canvas and WebAssembly APIs
• Batch-friendly when you have several files
• Original images stay untouched

Common mistakes to avoid

• Over-compressing images that contain small text
• Exporting transparency to JPEG

Examples

Input	Result
3.8 MB photo	~400 KB at quality 75 with visually identical results

Best used for

• Getting a reliable answer for image compressor without installing an app
• One-off tasks done in under a minute from any device
• Checking results before committing them to something important
• Working on a phone where desktop software is unavailable

Privacy

Images are processed on your device; nothing is uploaded unless a tool explicitly says a server lookup is involved.

Frequently asked questions

What quality setting is safe?

75-85 JPEG or WebQ quality 80 is the sweet spot; below 60 artifacts appear in flat skies and text.

Does it handle PNG screenshots?

For screenshots with text, prefer WebP lossless or keep PNG - JPEG blurs crisp edges.

What does the quality slider trade off?

File size versus visual fidelity - the live preview shows the resulting size before you commit, so the smallest acceptable quality is one drag away.

When should I choose WebP over JPEG output?

WebP typically saves 25-35% at the same visual quality - use it wherever the target platform accepts it, and JPEG for maximum compatibility.

Does batch mode apply the same settings to every file?

Yes - one quality setting and optional resize across the whole set, with per-file before/after sizes reported so outliers stand out.

More like this

Zoven offers 200+ free browser tools. Browse by category - Calculators, Converters, Generators, Developer Tools and Media Tools - or read workflow guides on the Zoven blog.