Image Compressor

Compress images to exact file sizes — 100% in your browser

Upload Image

Drag & drop an image or click to browse

Image Compressor: An image compressor reduces the file size of JPG, PNG and WebP images while keeping visible quality, so pages load faster and uploads are smaller. Drag in an image, choose a quality level, and download the compressed file — processed entirely in your browser.

Frequently Asked Questions

How does image compression work?

Compression removes redundant or imperceptible data from an image. Lossy compression (JPG, WebP) discards fine detail to shrink size dramatically, while lossless compression (PNG) reduces size with no quality change.

Will compressing an image reduce its quality?

Lossy compression trades a small amount of visible quality for a much smaller file. At 70–80% quality the difference is usually invisible while the file can be 60–80% smaller.

Are my images uploaded to a server?

No. SnoopTool compresses images locally in your browser using the Canvas API, so your photos are never uploaded, stored, or shared.

What image formats can I compress?

This tool compresses JPG/JPEG, PNG and WebP images. For photographs, JPG or WebP gives the smallest size; for graphics with flat colors and transparency, PNG or WebP is best.

What is an image compressor?

An image compressor shrinks a JPG, PNG or WebP file's size by re-encoding it at a lower quality setting or in a more efficient format, usually cutting 50–80% of the bytes with no visible difference.

SnoopTool compresses in the browser using the Canvas API — the picture is never uploaded, so private photos and screenshots stay on your machine. You control the quality slider and see the before/after size instantly.

Image Compressor: key facts

Reference facts for the SnoopTool Image Compressor, a free browser-based tool.
Supported inputs	JPG / JPEG, PNG, WebP
Typical saving	50–80% smaller at quality 0.7–0.8 with no visible loss
Compression type	Lossy re-encode via Canvas; PNG can also be converted to WebP
Privacy	Runs fully client-side — files are never uploaded
Cost	Free, unlimited images, no watermark

Why use the SnoopTool Image Compressor?

Get a photo under an upload limit for a form, portal or job application.
Cut page weight so images load faster and improve Core Web Vitals.
Compress screenshots before emailing them.
Convert bulky PNGs to WebP for the web.

How to use the Image Compressor (step by step)

Upload the image. Drag a JPG, PNG or WebP into the drop zone, or click to browse.
Choose a quality level. Start around 75–80% — the preview shows the trade-off.
Compare the sizes. The original and compressed file sizes are shown side by side.
Download. Save the compressed file; the original on your disk is untouched.

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SnoopTool is a free online tools website with 165+ browser-based calculators, converters and generators. No sign-up, no watermark, and every tool runs in your browser.

Go deeper

Read the SnoopTool guide behind this tool

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Answers, not just a number

Short, exact answers to the questions people ask alongside this tool — the number first, then the working.

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