Images & SVG

Image Compressor

Shrink JPEG, PNG, and WebP images and compare the result side by side before you download. Everything is processed in your browser — your image is never uploaded.

Runs in your browser v1.0.0

Choose an image

Stays on your device

Drop an image here or press Enter to choose a file · JPEG, PNG, WebP, GIF, BMP · up to 30 MB

Choose or drop an image to compress it locally.

Compression settings

Output format

Quality 80%

Lower quality means a smaller file. 75–85% is usually visually identical.

Advanced options

Max width in pixels

Leave blank to keep the original dimensions. Aspect ratio is preserved.

Result

Live

Compressed size —

—

Original: —
Dimensions: —
Format: —

Original Compressed

Drag to compare

How it works

The image is decoded in the browser and redrawn to an offscreen <canvas>, then re-encoded at your chosen quality with the browser’s own encoder. The result you compare and download is produced locally, so no image data ever leaves your device. Formats the browser cannot encode are reported with a friendly message instead of failing silently.

Practical uses

Re-encode a JPEG, PNG or WebP image in the browser at a chosen quality and optional maximum width, then compare and download the result.

Common ways to use it

Shrink a large JPEG before uploading it.
Export a screenshot as WebP at a chosen quality.
Cap a photo at 1920 pixels wide while keeping its aspect ratio.
Compare the compressed size against the original before downloading.

A 4.2 MB 4000 × 3000 JPEG planned for WebP at 80% and 1920 px wide

Input

File: beach.jpg, image/jpeg, 4200000 bytes
Format: WebP
Quality: 80
Max width: 1920 px

Output

Output name: beach.webp
Quality fraction: 0.8 (lossy)
Scaled size: 1920 × 1440 (was 4000 × 3000)

Verified with the tool's pure planning and scaling functions. The exact compressed byte count is produced by the browser encoder at export time and cannot be predicted in advance.

Options that matter

Output format — WebP (default), JPEG, or lossless PNG. The quality slider is disabled for PNG.
Quality — 10 to 100, default 80, applied only to WebP and JPEG. Presets are High 92, Balanced 80, Small 60, Tiny 40.
Max width in pixels — optional cap of 16 to 12000; aspect ratio is preserved and images are never enlarged.
Background for transparency — shown for JPEG only; transparent pixels are filled with this hex colour.
Drag to compare, Download compressed image, Copy summary.

Things to keep in mind

JPEG has no alpha channel, so transparency is flattened to the chosen background colour.
Output is limited to WebP, JPEG, or PNG; an uploaded GIF, BMP, or other format is re-encoded into one of those three.
SVG input is rejected because a vector graphic cannot be re-encoded as a raster.
Files over 30 MB are refused, and an animated image is drawn as a single canvas frame so animation is not preserved.
Encoding happens on a local canvas, so the exact compressed size depends on the browser and cannot be predicted in advance.