Images & files

Compress and resize images without uploading them.

Resize one static PNG, JPEG/JFIF, or WebP image, adjust lossy quality when it applies, and compare the real generated bytes before downloading. The work stays in your browser, and the tool verifies file signatures and output dimensions instead of trusting a name or extension.

One static image at a time
Runs entirely in your browser
Actual bytes—not an estimate

Source & settings

Set the size and quality.

Choose a PNG, JPEG/JFIF, or WebPStatic, single-image files only · up to 10.00 MB · nothing is uploaded

Browser-only processing. The selected file and generated output stay on this device unless you choose to share them.

Verified result

Compare the actual files.

Your optimized image will appear here.

The tool verifies the source header before decoding and the generated Blob before offering a download.

Choose a static PNG, JPEG, JFIF, or WebP image to begin.

What the controls mean

Resize first. Then judge the real result.

Control	What it changes	Boundary to remember
Dimensions	The number of pixels in the exported frame	Enlarging cannot create missing detail
JPEG/WebP quality	A browser encoder hint that trades detail for file size	82% quality does not mean 18% fewer bytes
PNG output	Lossless pixel export with transparency support	Unchanged dimensions may produce the same size or a larger file

What the browser redraw changes

The export redraws visible pixels on a canvas. It does not intentionally copy EXIF, XMP, IPTC, source DPI, or other source metadata. JPEG orientation is normalized to the decoded view. Color-profile handling, resampling, and encoder output can vary by browser, so exact pixels and bytes can differ.

Transparency and animation

PNG and WebP can keep transparent pixels. JPEG cannot, so the selected matte fills them. Animated PNG and WebP are rejected rather than silently exporting one frame. This tool does not crop, batch-process, or accept SVG, HEIC, GIF, BMP, or AVIF. Use the Image Format Converter first when a supported input-only format needs conversion.

A smaller file is not guaranteed

The result reports actual generated bytes and says when the file is smaller, identical, or larger. Large images can still fail on memory-constrained devices even when they are within the published safety limits.

Primary sources

Browser behavior you can verify.

Reviewed August 24, 2026. Browser encoders and resizing behavior can change, so Plainview Tools verifies every generated result at runtime.