Free Online Image Compressor Tool

An image compressor re-encodes a photo at a lower quality so the file gets dramatically smaller with little visible change.

Your data is processed entirely in your browser and never sent to any server.

Instant results 100% private No signup needed

How to Use This Tool

  1. Click Upload an image and pick a JPG, PNG, or WebP file.
  2. Choose an output format — JPEG for photos or WebP for the smallest size.
  3. Drag the Quality slider and watch the compressed size update live.
  4. Compare the original, compressed, and saved-percentage figures.
  5. Click Download to save the smaller image.

What Is an Image Compressor?

Image compression trades a small amount of visual fidelity for a large reduction in file size. Photographic images are best served by lossy formats — JPEG (the classic ISO standard) and WebP (Google's modern container) — which discard high-frequency detail the eye barely notices. Lossless formats like PNG and BMP keep every pixel exact but stay large, which is why this tool re-encodes to JPEG or WebP for the biggest savings.

The quality slider maps directly to the encoder's quantization setting: 1.0 keeps almost everything, while 0.5 throws away enough detail to halve or quarter the size. WebP usually beats JPEG by 25-35% at the same perceived quality and additionally supports alpha transparency.

Everything runs through the browser's Canvas API on your own device. The original is decoded into a canvas, redrawn, and re-encoded locally — your photo is never uploaded, so private images stay private.

Frequently Asked Questions

How much can I compress an image?
Compression depends on format and quality settings. Typically 50-80% size reduction is possible with minimal visible quality loss.
Does compression reduce image quality?
Lossy formats like JPG reduce quality; lossless options preserve it. Our tool lets you control the balance between size and quality.
What image formats are supported?
We support JPG, PNG, and WebP. Re-encoding to JPEG or WebP gives the biggest savings for photographic content.

Published by the WeGotEveryTool team. We build and test every tool in-house and update pages when the underlying spec, formula, or recommendation changes.

Reviewed: May 2026. Disclaimer: this tool is provided as-is for general informational use. For decisions with material consequences (medical, legal, financial, security) verify results against a qualified professional source.

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