QR Code & Barcodes · page 7
QR payload builders, barcode structure tools, label planning and scan-test utilities.
271 tools in this category
Validates even digit counts and optional mod-10 checks for ITF pairs.
Validates ITF-14 indicator digit, GTIN-14 body, and check digit.
Validates Codabar digits, ABCD start and stop pairs, and optional checksums.
Converts legacy ISBN-10 to ISBN-13 with a 978 prefix and recomputed check digit.
Explains registration-group and registrant split rules for hyphenating ISBNs.
Maps GS1 company-prefix ranges to member organizations by country.
Pads UPC-A values into GTIN-14 carton codes with indicator digits.
Explains indicator digits 1-8 and 9 for carton hierarchy levels.
Strips dashes and spaces from GTINs and reports length and type.
Prepends the 977 prefix and issue number to ISSNs for serial barcode conversion.
Maps number system and six digits to odd-even parity patterns for UPC-E structures.
Explains 2-digit and 5-digit add-ons for price, issue, and weight supplements.
Explains full-ASCII shift characters for lowercase and symbols in Code 39.
Chooses subsets A, B, or C for shortest encodings, with digit-run rules.
Explains FNC1 through FNC4 uses including GS1-128 and application triggers.
Estimates symbol width in modules from payload and subset choice.
Estimates Code 39 symbol widths from character count and narrow-wide ratio.
Explains Code 39 VIN encoding rules including I and O exclusion.
Explains A-D start and stop conventions and their uses in Codabar.
Explains Code 93 encoding, two check characters, and full-ASCII mode.
Chooses among Databar Omnidirectional, Stacked, Expanded, and Limited for retail data.
Compares DataMatrix and QR on capacity, module size, and marking use cases.
Covers Aztec compact versus full-range modes and error correction tiers.