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 |
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| Typical saving | 50–80% smaller at quality 0.7–0.8 with no visible loss |
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| Compression type | Lossy re-encode via Canvas; PNG can also be converted to WebP |
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| Privacy | Runs fully client-side — files are never uploaded |
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| Cost | Free, unlimited images, no watermark |
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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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