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Image Compressor — Free JPG, PNG & WebP Compressor (No Upload)

Shrink JPG, PNG, or WebP files. Before/after size shown side-by-side. Files never upload.

Free No signup Client-side Privacy friendly Updated

Drop an image here, or

Max 25 MB. Files never leave your browser.

Source

× · ·

Output

Processing…

× · ·

How to use

  1. 1 Drop an image (max 25 MB).
  2. 2 Pick output format and quality.
  3. 3 See the before/after size in real time.
  4. 4 Download the compressed result.

Why use this tool

  • Quality slider gives you direct control over the size/quality trade-off.
  • WebP output typically gives the smallest files.
  • See size delta percentage instantly — easy to dial in the sweet spot.
  • Pure client-side — no upload, no signup.

Frequently asked questions

What quality is "good enough"?

For web — 75–85% is usually visually identical to the original at a fraction of the size. Test with your specific image and screen.

Why does PNG output not honor the quality slider?

PNG is lossless — quality is fixed at 100%. Switch to JPG or WebP for adjustable compression.

How does this compare to TinyPNG / Squoosh?

Squoosh has more advanced encoders (MozJPEG, libwebp). For best compression, use Squoosh. This tool prioritizes simplicity and no external dependencies.

What is Image Compressor?

An Image Compressor is a tool that reduces the file size of an image while keeping its visible quality acceptable for screen or print. Lossy formats (JPG, WebP) drop perceptual detail; lossless modes re-encode without quality loss. Browser-based compressors run the encoder in JavaScript or WebAssembly so the original image never leaves the user's device — important for screenshots, design drafts, or anything not yet public.

How Image Compressor compares to alternatives

Image Compressor versus typical browser and desktop alternatives — features compared at a glance.
Feature Zerethon Tools Typical online tools Desktop apps
Files leave device No Yes (upload) No
JPG / PNG / WebP All three Usually JPG only All three
Before/after preview Yes Sometimes Yes
Watermark No Sometimes No
Free Yes Yes (with ads) Often paid
Summary

Image Compressor is a free creator utility by Zerethon Tools. Shrink JPG, PNG, or WebP files. Before/after size shown side-by-side. Files never upload. Runs entirely in the browser — no signup, no upload.

Category
Creator
Pricing
Free
Privacy
Browser-based
Signup
Not required

Privacy

Your data never leaves your browser unless explicitly stated. Image Compressor runs entirely client-side — no server upload, no logging, no tracking of your input.

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