TrueAlpha v0.1.0 — Initial Release

TrueAlpha v0.1.0 — Initial Release

TrueAlpha v0.1.0 is the first public release of the browser-local PNG transparency inspector.

Try the hosted version at https://kanadek.github.io/true-alpha/.

Included

• PNG alpha and transparency-structure detection.
• Batch analysis for up to 100 PNG files.
• Suspected solid-color background detection.
• Suspected baked checkerboard detection.
• White, black, gray, RGB, and checkerboard previews.
• JSON and CSV analysis reports.
• Non-destructive transparent-padding trim.
• English and Simplified Chinese interfaces.
• GitHub Pages-ready static deployment.

Privacy

Images never leave the browser. There is no upload service, account, database, or external analysis API.

Known limitations

• Background and checkerboard findings are conservative heuristics and can produce false positives or false negatives.
• Semi-transparent pixels are often valid antialiasing or shadow data and are reported without being treated as an error.
• Imports are capped at 25 MB, 100 files per batch, and 32 million decoded pixels per image; browser decode and canvas limits can be lower.
• APNG frames, WebP, AVIF, background removal, and image editing are outside this release.

Static package

true-alpha-v0.1.0-static.zip contains the built site and a short deployment guide.