How can I compress an image online for free?

Upload your image to the tool above, pick a quality (80 is a good default), and run it — the file is compressed in your browser and you can download the result immediately. It is free, needs no signup, and nothing is uploaded to a server.

How do I reduce image size without losing visible quality?

Use a quality of 80–85 and, for large photos, a max width around 1920 px. The compressor re-encodes the image at that quality; at 80–85 the difference is invisible on screens while the file can shrink by half or more, depending on the source.

What is a good image size reducer for websites?

A good image size reducer lets you control quality and dimensions and shows before/after sizes. This tool does that: upload, set quality and optional max width, and compare the original and compressed sizes before downloading.

Can I compress a JPG without uploading it anywhere?

Yes — compression runs entirely in your browser using the browser-image-compression engine, so your JPG never leaves your device. That is also why the tool cannot run server-side or from a script: it needs a real browser with canvas support.

Why did my PNG barely shrink?

PNG is a lossless format, so the quality setting does not re-encode it the way JPEG is. PNGs with lots of detail or that are already optimized have little redundancy left to remove. For photos, converting to JPEG or WebP at quality 80 usually shrinks the file far more.

What quality setting should I use for web images?

Quality 80 is the common sweet spot for web photos — visibly identical on screens with big savings. Use 70 for thumbnails and decorative images, and 90–95 only when every pixel matters (print prep, portfolio originals).

Image Compressor

What is Image compressor?

Image Compressor — Shrink images right in your browser — this free image compressor cuts JPG, PNG and WebP file size with quality and resize controls, nothing uploaded.

Compression is performed client-side by the browser-image-compression engine (MIT), which re-encodes the image through the browser canvas at your chosen quality and optional max width. Honest limits: the quality setting only affects lossy encodings (JPEG/WebP); already-optimized or simple PNGs may shrink only slightly, and lossless formats cannot beat their own encoding limits. Real compression only runs in a browser — server-side or scripted runs return a message saying so.

Why use this image compressor?

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Built for image compressor

Shrink images right in your browser — this free image compressor cuts JPG, PNG and WebP file size with quality and resize controls, nothing uploaded.

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Transparent & honest

Compression runs entirely in your browser — your image is never uploaded anywhere.

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Private by design

Everything runs in your browser. Your inputs never leave your device.

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Works everywhere

Fully responsive — perfect on desktop, tablet, and mobile. No app needed.

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Regularly updated

Regularly maintained and reviewed to ensure accuracy.

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Free forever

No accounts, no limits, no watermarks. Use Image Compressor as much as you need.

How to use Image Compressor

1Upload an image (JPG, PNG, or WebP, up to 25 MB) in the "Image to compress" box.
2Set "Quality (%)" — 80 is a good starting point for web use.
3Optionally set "Max width (px)" to downscale large photos; leave it blank to keep the original dimensions.
4Run the tool — compression happens entirely in your browser, nothing is uploaded.
5Preview the result, check the size savings, and download the compressed image.

What can you do with Image Compressor?

Compress image online free — Shrink images right in your browser — this free image compressor cuts JPG, PNG and WebP file size with quality and resize controls, nothing uploaded.
Reduce image size without losing visible quality — Shrink images right in your browser — this free image compressor cuts JPG, PNG and WebP file size with quality and resize controls, nothing uploaded.
Image size reducer for websites — Shrink images right in your browser — this free image compressor cuts JPG, PNG and WebP file size with quality and resize controls, nothing uploaded.
Compress jpg without uploading — Shrink images right in your browser — this free image compressor cuts JPG, PNG and WebP file size with quality and resize controls, nothing uploaded.
Quality setting for web images — Shrink images right in your browser — this free image compressor cuts JPG, PNG and WebP file size with quality and resize controls, nothing uploaded.

Good to know

Compression runs entirely in your browser — your image is never uploaded anywhere.
The quality setting only affects lossy encodings (JPEG/WebP); PNG files shrink mainly by resizing or by converting to a lossy format.
Actual savings depend on the source image: noisy photos compress less than clean graphics.
Max width downscales proportionally (aspect ratio is preserved); leaving it blank keeps original dimensions.

How it works

Compression is performed client-side by the browser-image-compression engine (MIT), which re-encodes the image through the browser canvas at your chosen quality and optional max width. Honest limits: the quality setting only affects lossy encodings (JPEG/WebP); already-optimized or simple PNGs may shrink only slightly, and lossless formats cannot beat their own encoding limits. Real compression only runs in a browser — server-side or scripted runs return a message saying so.

Examples

Product photo for a website

Upload a product photo — quality 80 with a 1920 px cap gives a web-ready file that still looks sharp.

Maximum fidelity archive

Upload a photo — quality 95 with no resize keeps near-original detail with a modest size saving.

Small thumbnail

Upload a large photo — quality 70 with an 800 px cap produces a lightweight thumbnail.

People also search for these — this tool handles them all:

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