A few days ago I launched PasteCheck — a free tool
to paste code and see errors highlighted instantly.
After launch I found real gaps and shipped v1.3.
Here's what changed:
Python indentation monitor
Now flags mixed tabs and spaces as an error, and
inconsistent indentation style across the file as
a warning.
CSS property validator
Embedded CSS inside HTML now checked for misspelled
properties. Catches things like colour instead of
color, font-weigh instead of font-weight —
with "did you mean X?" suggestions.
Aria-label support
Previously flagged inputs with aria-label or
aria-labelledby as unlabelled. Fixed — those are
now correctly recognised as labelled.
Language detection confidence UI
Short snippets under 5 lines now show a subtle ?
badge next to the detected language so users know
detection may be approximate.
All shipped in a single session, tested, live.
Try it: https://www.pastecheck.co.uk
What would you want to see in v2?
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