collectionHQ Toolbox
Free, fast, and privacy-friendly tools built for librarians. No account required — just paste, upload, and go.
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ISBN Utility
Extract, validate, convert, and hyphenate ISBNs from any text.
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Call Number Sorter
Sort Library of Congress and Dewey Decimal call numbers in shelf order.
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MARC Validator
Upload and parse MARC21 files with field validation and a readable grid.
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Barcode Generator
Generate printable Code 39 and Codabar barcodes from number sequences.
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Encoding Fixer
Repair mojibake and garbled text from vendor data and MARC records.