BatchForge: private batch image conversion

At school, teachers regularly bring me images in whatever format their device happened to produce. Converting them meant uploading files to online converters, often one at a time. That is slow, awkward, and a poor default for material that may contain student or school information.

So I made BatchForge. You can give it individual images or an entire folder, choose the WebP quality and maximum width, and download the results individually or as one ZIP. The conversion happens inside your browser. The images are not uploaded to BatchForge or sent to a third-party conversion service.

What it supports

BatchForge accepts PNG, JPEG, WebP, AVIF, GIF, BMP, SVG, ICO, HEIC/HEIF, and TIFF, and outputs WebP. It includes Light, Dark Gray, and Pure Black themes. There is no artificial batch-count limit, although the practical limit still depends on the computer and browser memory.

Limits, stated plainly

This is a focused still-image converter, not a universal graphics editor. TIFF uses the first page; multi-image HEIC/HEIF and multi-resolution ICO use the first decoded image; animated inputs become a static WebP frame. Camera RAW, PSD, and PDF are not supported. Browser-level format decoding can also vary on older browsers, so a current Chromium-based browser is the safest choice.

Free to use, inspect, and change

The software is released under the MIT License. That means anyone may use, copy, modify, distribute, sublicense, or sell it, provided the copyright and licence notice remain with substantial copies. I chose MIT rather than a Creative Commons licence because MIT is written specifically for software.

Author: Andraž Đurič. Built in collaboration with AI systems; the author retains responsibility for the released work.
Post licence: CC BY 4.0. Software licence: MIT.