Which format should I choose — JPEG, WebP, or PNG?

JPEG and WebP use lossy compression and produce the smallest files for photos; WebP typically compresses smaller than JPEG at the same visual quality. PNG is lossless and best for images with sharp edges, text, or transparency, but produces larger files for photos.

Why does my compressed image still look large?

Try lowering the quality slider and reducing the max width — both significantly affect file size. PNG ignores the quality slider entirely, since PNG compression is lossless and doesn't have a quality setting.

Does resizing reduce image quality?

Reducing dimensions (max width) removes pixel data and can't be undone, but for most web use cases, a smaller image displayed at its natural size looks identical to the original — the quality loss only becomes visible if you try to display it larger than its new resolution.

Image Compressor & Resizer

Shrink an image's file size and dimensions right in your browser — no upload, no wait.

Drop an image here, or click to choose a file

JPEG, PNG, or WebP — processed entirely in your browser

How to use the image compressor

Click to select a JPEG, PNG, or WebP image from your device.
Set the max width in pixels and pick an output format (JPEG, WebP, or lossless PNG).
Drag the quality slider to balance file size against visual quality.
Click "Compress", review the before/after file size, then download the result.

How client-side compression works

The browser decodes your chosen image into memory, draws it onto an off-screen canvas at the max width you set (scaling height to preserve the original aspect ratio), then re-encodes that canvas into a new file at the quality level you choose. This is the same underlying technique desktop image editors use — just running locally in your browser instead of a native app or a server.

Format	Compression	Best for
JPEG	Lossy	Photos, wide compatibility
WebP	Lossy	Photos, smaller than JPEG at same quality
PNG	Lossless	Logos, text, transparency

Quick answer

An image compressor reduces a photo's file size by re-encoding it at a lower quality setting and/or smaller pixel dimensions. This tool does that entirely in your browser using the Canvas API — the image is never uploaded to a server — letting you choose the output format (JPEG, WebP, or lossless PNG), quality level, and maximum width before downloading the result.

Image Compressor — FAQs

No. The image is decoded and re-encoded entirely in your browser using the HTML Canvas API — it never leaves your device. This also means it works even on a slow connection, since there's nothing to upload or download.

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