Two Trees

Toolkit · 4 tools

Image tools

Resize, compress, crop and convert PNG, JPEG and WebP images in your browser. Choose dimensions or a crop region, inspect real output sizes and download the result. Files are not uploaded.

Resize an image

Set exact dimensions or preserve the aspect ratio.

Open tool

Compress an image

Adjust JPEG or WebP quality and inspect file size.

Open tool

Crop an image

Choose a rectangular region to keep.

Open tool

Convert image format

Convert between PNG, JPEG and WebP.

Open tool

Choose the result you care about

The image tools operate on real pixels in the browser. Resize to exact dimensions, re-encode for a smaller file, crop a rectangle, or convert between PNG, JPEG and WebP. The result panel reports the actual dimensions and file type instead of assuming the requested format succeeded.

Pick by task

  • Resize when the pixel dimensions matter, such as an upload form or a fixed layout slot.
  • Compress when the file size matters more than preserving every detail. JPEG and WebP are lossy; PNG is not a lossless optimiser here.
  • Crop when only a rectangular region should remain. Coordinates are measured from the top-left corner.
  • Convert when another application needs a specific format. JPEG is broadly compatible but has no transparency; PNG and WebP can keep it.

Formats, transparency and quality

  • PNG, JPEG and WebP are supported. SVG, animated images and unsupported camera formats are rejected rather than guessed.
  • The tools enforce byte and pixel limits before allocating a canvas. Very large images can still be slow on a phone.
  • JPEG has no alpha channel, so transparent pixels are composited onto a background. PNG and WebP can preserve transparency.
  • Re-encoding a JPEG or WebP is lossy. Converting a lossy image to PNG does not restore detail that was already lost.

Common questions

Will resizing keep the aspect ratio?

The resize tool offers an aspect-ratio lock. Keep it on when you only need one dimension to change; turn it off when the target form requires an exact width and height.

Does converting a JPEG to PNG improve quality?

No. PNG is lossless for the pixels in the converted image, but it cannot recover detail removed by the earlier JPEG compression.

Are images uploaded?

No. The browser decodes and redraws the image locally. The original file and the generated output stay on your device unless you choose to download or share them.

Processing happens in your browser. Files and pasted contents are not uploaded. No account needed.