Developer · Local utility
Check pasted HTML or metadata batches for missing and duplicate tags; generate escaped metadata and approximate previews.
Task path / input to outcome
Prepare input
Runs locally · Nothing is uploaded
Task path / input to outcome
Paste content or import a UTF-8 text file. Choose an operation and check the example.
Run explicitly, compare the output with the original and review every diagnostic before using it.
Copy or download the current output; export row-level findings separately.
Metadata Preflight uses its verified local execution path and does not create a hidden input or output history.
Runs inside the current browser tab.
Active tool data never becomes a Toolars document record.
Use the core workflow without creating a profile. Favorites sync to your account after you sign in.
Clear the tab and the active working data is gone.
Check pasted HTML or metadata batches for missing and duplicate tags; generate escaped metadata and approximate previews.
Common questions