About Image Compressor
Compress JPG, PNG, and WebP images to a smaller file size right in your browser — adjust the quality, convert the format, or aim for a target size, and compare the original and compressed result side by side before you download. Your images are never uploaded.
How to Use
- Drag and drop an image, or click to choose one (JPG, PNG, or WebP).
- Pick a quality and output format, set a target file size, or just tap Recommended.
- Compare the original and compressed image and file sizes side by side.
- Download the smaller image.
Why Use This Tool?
- Accurate — built on precise, well-tested mathematical formulas.
- Instant — all calculations happen client-side for zero latency.
- Private — no data is sent to any server; your information stays on your device.
- Free — no sign-up, no limits, no hidden costs.
Frequently Asked Questions
What is image compression?
Image compression reduces a file's size by encoding its pixels more efficiently and, for lossy formats, discarding detail the eye barely notices. This tool does it in your browser by re-drawing the image on an HTML canvas and re-encoding it.
Does compression reduce image quality?
It depends on the type. Lossy compression (JPG and lossy WebP) trades a little quality for a much smaller file — around 80% quality is usually indistinguishable from the original for photos. Lossless compression (PNG, or lossless WebP) keeps every pixel exactly but saves less.
Which format should I use?
JPG is best for photographs, PNG for logos, screenshots, and anything needing transparency, and WebP is a strong all-rounder that usually produces the smallest files and still supports transparency. Actual savings vary with the image and settings.
How do I compress an image to 100 KB?
Set a target file size and the tool lowers the quality automatically to get under it. Very large or highly detailed images may not reach a small target at usable quality — in that case, reduce the dimensions first with the Image Resizer, then compress.
Can I compress JPG, PNG, and WebP images?
Yes. The tool reads JPG, PNG, and WebP images and can output JPG, PNG, or WebP, or keep the original format. Converting a transparent PNG to JPG will fill transparent areas with white, so keep PNG or WebP to preserve transparency.
Are my images uploaded to a server?
No. All compression happens entirely in your browser using the HTML5 Canvas API — your images never leave your device.
Can I compress multiple images at once?
Not yet — this tool compresses one image at a time. Batch compression may be added later; for now, compress and download each image individually.