Funky Design Tools

✺ The tools · Batch Converter

Batch Converter

Convert a whole folder to WebP, AVIF or optimised PNG at the quality you choose. Per-file or one ZIP, nothing uploaded.

  • WebP, AVIF and lossless-optimised PNG, encoded in your browser with the Squoosh WebAssembly codecs
  • One quality dial per batch, with the size saving shown live on every finished file
  • Mix formats across drops: the format and quality lock in per image the moment you add it
  • Download any single result or the whole batch as one ZIP, with no uploads and no per-image fees
Get all-access, £5.99/month →Every tool, one subscription.

Runs entirely in your browser. Your files never leave your machine.

See it in action

The Batch Converter with several images converted to WebP, each row showing the size before and after and the percentage saved.
Convert a folder to WebP, AVIF or optimised PNG, with the savings shown.

Three steps

  1. Pick a format and quality
  2. Drop your images
  3. Download each file, or the batch as a ZIP
Takes
Browser-readable images, one or a batch.
Gives
WebP, AVIF or lossless-optimised PNG, single files or a ZIP. Encoded in your browser, nothing uploaded.