# UPCGen

> Free UPC, EAN, ISBN, GTIN, and FNSKU barcode generator for Amazon, Shopify, Etsy, eBay, and 50+ e-commerce platforms. Every code passes UPC/EAN check-digit validation and platform syntax checks; for retail listings on Amazon/Walmart you still need a GS1-licensed Company Prefix from gs1us.org.

UPCGen serves indie e-commerce sellers, Amazon FBA sellers, Shopify merchants, distributors, and developers. Free tier provides 1 code/24h for anonymous visitors and 5 codes/day for registered users. Paid plans (from $9/mo) unlock higher monthly quotas, bulk CSV export, SVG/PDF/EPS downloads, Avery label-sheet PDFs, REST API access, and team seats. Codes past plan quota bill at $0.05/code via Stripe metered billing.

Supported barcode types: UPC-A (12-digit retail), UPC-E (8-digit compressed), EAN-13 (international retail), EAN-8 (small-package retail), ISBN (books), ITF-14 (shipping cartons), Code 128 (variable-length alphanumeric), FNSKU (Amazon FBA), Data Matrix (2D high-density).

## Primary pages

- [UPCGen — Barcode Generator](https://upcgen.com/): Generate UPC-A, UPC-E, EAN-13, EAN-8, ISBN, ITF-14, Code 128, FNSKU, and Data Matrix barcodes in the browser. Free 5/day, paid plans from $9/mo.
- [Pricing & Plans](https://upcgen.com/subscribe): Starter $9/mo (100 codes), Pro $29/mo (3,000 codes + bulk CSV + SVG/PDF/EPS + Avery sheets), Business $99/mo (25,000 codes + team seats + higher API rate limits). Annual saves 17%.
- [Buy UPC Codes](https://upcgen.com/buy-upc-codes): Buy real GS1-derived UPC codes that work on Amazon (non-Brand-Registry), eBay, Etsy, Walmart, Shopify, and retail. Pricing from $5/code, instant download, includes PNG/JPG/PDF and Certificate of Authenticity.
- [API Documentation](https://upcgen.com/api-docs): REST API for programmatic barcode generation. Drops into Claude Code, ChatGPT/Codex, Cursor, openclaw, Aider, Continue, Cline, Roo Code, and any MCP-compatible AI agent. Authentication via Bearer token. Endpoints: POST /api/barcode (PNG/SVG render), POST /api/generate (random/sequential code generation, CSV/JSON output). Includes Claude + OpenAI function-calling tool definitions. Per-tier rate limits.
- [Free Barcode Tools](https://upcgen.com/tools): Hub of free utility tools: check digit calculator, GTIN converter (UPC↔EAN↔GTIN-14), ITF-14 case code generator.
- [UPC/EAN/GTIN Check Digit Calculator](https://upcgen.com/tools/check-digit-calculator): Interactive tool: compute GS1 Mod 10 check digit for UPC-A, EAN-13, EAN-8, ITF-14. Paste digits, get the check digit instantly.
- [GTIN Converter (UPC ↔ EAN ↔ GTIN-14)](https://upcgen.com/tools/gtin-converter): Convert UPC-A, EAN-13, GTIN-14 between formats. Zero-pad, drop leading zero, recompute check digit, validate input.
- [ITF-14 Case Code Generator](https://upcgen.com/tools/itf-14-generator): Build ITF-14 case codes (GTIN-14) from a UPC-A or EAN-13 plus an indicator digit (0-8). Walmart/Costco/Carrefour shipping carton requirement.
- [GS1-128 Application Identifier Builder](https://upcgen.com/tools/gs1-128-builder): Compose GS1-128 / GS1 DataMatrix strings with Application Identifiers ((01) GTIN, (10) lot, (17) expiry, (21) serial, (00) SSCC, GLN, dates). Validates check digits, lengths, and inserts FNC1 separators. For DSCSA, FDA UDI, EU FMD, Walmart shipping.
- [Barcode Validator](https://upcgen.com/tools/barcode-validator): Paste any UPC-A, EAN-13, EAN-8, ISBN-13, or GTIN-14 and instantly verify format, check digit (GS1 Mod 10), and identify the GS1 country prefix. Digit-by-digit breakdown.
- [SSCC Generator (18-digit shipping container code)](https://upcgen.com/tools/sscc-generator): Build a Serial Shipping Container Code from GS1 Company Prefix + serial reference + extension digit. The 18-digit GS1 logistics identifier for pallets and shipping units.
- [GS1 Country Prefix Lookup](https://upcgen.com/tools/gs1-prefix-lookup): Identify which country issued a barcode from its GS1 prefix. Paste any EAN-13/GTIN-14 to look up origin, or browse the full table of 100+ GS1 country prefix ranges (978/979 books, 977 ISSN, 690-699 China, 50-509 UK, etc.).
- [GS1 Digital Link Builder](https://upcgen.com/tools/gs1-digital-link-builder): Build a GS1 Digital Link URL — the Sunrise 2027 web form of a GTIN — and render it as a Data Matrix. Encodes GTIN + lot + expiry + serial as id.gs1.org/01/{GTIN}/{AIs}. Scannable at retail POS and by consumer phones.
- [Free Online Barcode Scanner](https://upcgen.com/tools/barcode-scanner): Free in-browser barcode scanner using device camera. Scans UPC-A, UPC-E, EAN-13, EAN-8, ITF-14, Code 128, Code 39, ISBN, QR Code, Data Matrix, PDF417, Aztec. No app install, no upload — everything runs locally via the BarcodeDetector API + polyfill.
- [Learn — Barcode Reference Hub](https://upcgen.com/learn): Hub page listing all 33+ /learn guides: fundamentals, by-digit-count, how-to, buying & pricing, platform requirements, compliance, niche formats.
- [Compare — Barcode Format Comparisons](https://upcgen.com/compare): Hub page listing all 12+ side-by-side comparisons: UPC vs EAN, GTIN vs UPC, QR vs Data Matrix, RFID vs barcode, ISBN-10 vs 13, ASIN vs UPC, etc.
- [Barcode Generators (hub)](https://upcgen.com/generators): Hub page listing all 9 barcode-format generators (UPC, EAN, ISBN, ITF-14, Code 128, FNSKU, Data Matrix). Each links to a format-specific generator.
- [UPC-A Generator](https://upcgen.com/generators/upc-a): Generate 12-digit UPC-A barcodes with valid GS1 check digit for Amazon, Walmart, and North American retail.
- [EAN-13 Generator](https://upcgen.com/generators/ean-13): Generate 13-digit EAN-13 (GTIN-13) barcodes for international retail (Europe, Asia, Latin America).
- [JAN Code Generator](https://upcgen.com/jan-code-generator): Generate JAN (Japanese Article Number) barcodes — the Japanese-market name for EAN-13 with GS1 Japan prefix (45/49). For Amazon Japan, Rakuten, Yahoo Shopping.
- [ISBN Barcode Generator](https://upcgen.com/generators/isbn): Generate 13-digit ISBN barcodes for books, e-books, audiobooks. Used by Amazon KDP, IngramSpark, bookstores.
- [FNSKU Generator](https://upcgen.com/generators/fnsku): Generate Amazon FBA FNSKU labels (X00-prefixed Code 128) for fulfillment center shipments.
- [UPC-E Generator](https://upcgen.com/generators/upc-e): Generate 8-digit compressed UPC-E barcodes for small packaging (cosmetics, candy, single-serve).
- [EAN-8 Generator](https://upcgen.com/generators/ean-8): Generate 8-digit EAN-8 barcodes for small European retail packaging.
- [ITF-14 Generator](https://upcgen.com/generators/itf-14): Generate 14-digit ITF-14 barcodes for shipping cartons, master cases, retail logistics.
- [Code 128 Generator](https://upcgen.com/generators/code-128): Generate variable-length Code 128 barcodes for shipping labels, inventory, healthcare, asset tags.
- [Data Matrix Generator](https://upcgen.com/generators/data-matrix): Generate 2D Data Matrix barcodes for pharma serialization (DSCSA), automotive parts, electronics, medical devices.
- [Barcode guides by platform](https://upcgen.com/for): Hub of platform-specific barcode setup guides (Amazon, Shopify, Etsy, eBay, Walmart, KDP).
- [Barcodes for Amazon](https://upcgen.com/for/amazon): Amazon listing setup with UPC-A and FNSKU labels.
- [Barcodes for Shopify](https://upcgen.com/for/shopify): Shopify listing setup with UPC-A and EAN-13.
- [Barcodes for Etsy](https://upcgen.com/for/etsy): Etsy GTIN setup with UPC-A.
- [Barcodes for eBay](https://upcgen.com/for/ebay): eBay product identifier setup with UPC-A.
- [Barcodes for Walmart](https://upcgen.com/for/walmart): Walmart Marketplace and Retail Link setup with UPC-A.
- [Barcodes for Amazon KDP](https://upcgen.com/for/kdp): Amazon KDP self-publishing ISBN setup.
- [UPC for Amazon](https://upcgen.com/for/amazon/upc-a): Step-by-step: add UPC-A to Amazon product listings.
- [FNSKU for Amazon FBA](https://upcgen.com/for/amazon/fnsku): Step-by-step: generate, print, and apply FNSKU labels to FBA units.
- [UPC for Shopify](https://upcgen.com/for/shopify/upc-a): Step-by-step: add UPC-A to Shopify products.
- [EAN-13 for Shopify](https://upcgen.com/for/shopify/ean-13): Step-by-step: add EAN-13 to Shopify products for international sales.
- [UPC for Etsy](https://upcgen.com/for/etsy/upc-a): Step-by-step: add UPC/GTIN to Etsy listings.
- [UPC for eBay](https://upcgen.com/for/ebay/upc-a): Step-by-step: add UPC product identifiers to eBay listings.
- [UPC for Walmart Marketplace](https://upcgen.com/for/walmart/upc-a): Step-by-step: add GS1-registered UPC-A to Walmart listings.
- [ISBN for Amazon KDP](https://upcgen.com/for/kdp/isbn): Step-by-step: assign ISBN and render the back-cover barcode for KDP books.
- [Barcodes for Amazon EU](https://upcgen.com/for/amazon-eu): Amazon European marketplaces setup with EAN-13 and FNSKU.
- [Barcodes for IngramSpark](https://upcgen.com/for/ingramspark): IngramSpark self-publishing ISBN setup.
- [Barcodes for UPS](https://upcgen.com/for/ups): UPS shipping label Code 128 / GS1-128 setup.
- [Barcodes for FedEx](https://upcgen.com/for/fedex): FedEx shipping label Code 128 setup.
- [EAN-13 for Amazon EU](https://upcgen.com/for/amazon-eu/ean-13): Step-by-step: add EAN-13 to Amazon European marketplace listings.
- [FNSKU for Amazon EU FBA](https://upcgen.com/for/amazon-eu/fnsku): Step-by-step: FNSKU labels for Amazon European FBA units.
- [ITF-14 for Walmart](https://upcgen.com/for/walmart/itf-14): Step-by-step: ITF-14 outer-case codes for Walmart Retail Link.
- [ISBN for IngramSpark](https://upcgen.com/for/ingramspark/isbn): Step-by-step: assign ISBN and render the back-cover barcode for IngramSpark titles.
- [Code 128 for UPS](https://upcgen.com/for/ups/code-128): Step-by-step: render Code 128 barcodes for UPS shipping labels.
- [Code 128 for FedEx](https://upcgen.com/for/fedex/code-128): Step-by-step: render Code 128 barcodes for FedEx shipping labels.
- [Barcodes by industry](https://upcgen.com/industries): Hub of industry-vertical barcode setup guides (cosmetics, food, pharma, electronics, healthcare).
- [Cosmetics Barcodes](https://upcgen.com/industries/cosmetics): Generate UPC, EAN, and batch codes for cosmetics, skincare, and beauty SKUs. GS1-ready, Sephora/Ulta/Amazon Beauty accepted.
- [Food Barcodes](https://upcgen.com/industries/food): Generate UPC, EAN-13, and GS1-128 case codes for food and beverage products. Walmart, Kroger, and Amazon Fresh compliant.
- [Pharma Barcodes](https://upcgen.com/industries/pharma): DSCSA-compliant Data Matrix codes, NDC barcodes, and GS1 serial numbers for pharmaceutical packaging. Phase-2 ready.
- [Electronics & Asset Tag Barcodes](https://upcgen.com/industries/electronics): Barcodes for electronics SKUs, PCB serial numbers, and IT asset tags. UPC, EAN, Code 128, and Data Matrix.
- [UDI Barcodes for Medical Devices](https://upcgen.com/industries/healthcare): FDA UDI barcodes and GS1 Data Matrix codes for medical devices. UDI-DI, UDI-PI, GUDID-ready format.
- [Barcodes for Clothing & Apparel](https://upcgen.com/industries/apparel): Apparel barcodes: GS1 UPC for retail, FNSKU for Amazon FBA, RFID hangtags for Walmart/Macy's/Zara, country-of-origin compliance, SKU-per-variant rules.
- [Barcodes for Books & Publishing](https://upcgen.com/industries/books): Book barcodes: ISBN-13 as Bookland EAN-13 with 978/979 prefix, 5-digit price add-on, BISG placement, Bowker vs free KDP/IngramSpark ISBN, ITF-14 case codes.
- [Barcodes for Music & Vinyl](https://upcgen.com/industries/music): Music barcodes: UPC/EAN for vinyl/CD/digital releases, ISRC for individual tracks, distributor (DistroKid/TuneCore/CD Baby) vs owned Bowker UPC tradeoff, vinyl jacket placement.
- [What Is a GS1 Barcode?](https://upcgen.com/learn/gs1-barcode): GS1 barcode umbrella term: the 6 types (UPC, EAN, ITF-14, GS1-128, GS1 DataMatrix, GS1 DataBar), how to verify a real GS1 code, GS1 vs non-GS1 barcodes, how to get a GS1 prefix.
- [GS1 DataMatrix Guide](https://upcgen.com/learn/gs1-datamatrix): GS1 DataMatrix for pharma DSCSA serialization, EU FMD, FDA UDI medical devices. AI structure, FNC1, vs plain Data Matrix vs QR, sizing for scanner compliance.
- [GS1-128 Guide](https://upcgen.com/learn/gs1-128): GS1-128 logistics barcode with Application Identifiers (GTIN, SSCC, lot, expiry, serial). Where required (Walmart, Costco, DSCSA, EDI 856), how it differs from plain Code 128.
- [GS1 France Guide](https://upcgen.com/gs1-france): GS1 France (formerly Gencod) prefixes 300-379. How to register, pricing, retail/Carrefour/E.Leclerc requirements, and free EAN-13 generation for testing.
- [GS1 Japan Guide](https://upcgen.com/gs1-japan): GS1 Japan (流通システム開発センター) prefixes 45/49, the JAN code system, registration via dsri.jp, retail/Amazon Japan/Rakuten requirements.
- [GS1 Korea Guide](https://upcgen.com/gs1-korea): GS1 Korea prefix 880, registration via koreannet.or.kr, retail and KAN barcode requirements for Korean e-commerce.
- [GS1 UK Guide](https://upcgen.com/gs1-uk): GS1 UK prefixes 50-59 and 500-509, membership pricing by turnover, Tesco/Sainsbury's/Boots/Amazon UK requirements, and free EAN-13 generator for prototypes.
- [Asset Tag Barcodes](https://upcgen.com/industries/asset-tags): Code 128 and Code 39 asset tags for IT equipment, laptops, tools, lab instruments. ServiceNow, Asset Panda, Snipe-IT compatible. Numbering scheme design, label durability, scan workflows.
- [Library Barcodes](https://upcgen.com/industries/library): Code 39 and Code 128 library barcodes for books, patrons, DVDs, archive boxes. Compatible with Sirsi, Polaris, Koha, Alma, Follett. 14-digit ALA standard, placement, ILL handling.
- [GS1 Sunrise 2027 Explained](https://upcgen.com/learn/sunrise-2027): Sunrise 2027 is GS1's January 2027 target for retail POS scanners to accept 2D barcodes (GS1 Digital Link, QR, GS1 DataMatrix) alongside traditional 1D UPC. What it means for brands, retailers, packaging timelines, and which 2D format to use.

## Resources

- [Barcode Types Guide](https://upcgen.com/learn/barcode-types): Reference for every common barcode standard: UPC, EAN, ISBN, GS1-128, Code 128, ITF-14, Data Matrix, FNSKU, QR. Which one to use for Amazon, Shopify, books, shipping, pharma.
- [What Is a UPC?](https://upcgen.com/learn/what-is-upc): What is a UPC: 12-digit Universal Product Code explained. How to get one from GS1, structure, and how to generate UPC-A barcodes.
- [What Is an ASIN?](https://upcgen.com/learn/what-is-asin): What is an ASIN: Amazon's 10-character product identifier. How ASIN differs from UPC and FNSKU, how to find or get one.
- [What Is a GTIN?](https://upcgen.com/learn/what-is-gtin): What is a GTIN: Global Trade Item Number. How UPC/EAN/ITF are all GTIN formats. How to get one from GS1.
- [What Is a Barcode?](https://upcgen.com/learn/what-is-a-barcode): What is a barcode: how barcodes work, 1D vs 2D, major types, and how to make your own.
- [UPC vs EAN](https://upcgen.com/compare/upc-vs-ean): UPC vs EAN: 12 vs 13-digit barcode differences, structure, geography, Amazon acceptance, and when to use which.
- [Code 128 vs Code 39](https://upcgen.com/compare/code-128-vs-code-39): Code 128 vs Code 39: density, character set, checksums, and when each format makes sense for shipping, inventory, and asset tags.
- [QR Code vs Data Matrix](https://upcgen.com/compare/qr-code-vs-data-matrix): QR Code vs Data Matrix: which 2D barcode to use for marketing, pharma serialization, PCB marking, or consumer scanning.
- [1D vs 2D Barcodes](https://upcgen.com/compare/1d-vs-2d-barcode): 1D vs 2D barcodes: data capacity, scanner compatibility, damage tolerance, and when to use linear vs matrix codes.
- [What Is an ISBN?](https://upcgen.com/learn/what-is-isbn): What is an ISBN: 13-digit book identifier. How to get one from Bowker, ISBN-10 vs ISBN-13, how Amazon and KDP use it.
- [What Is an EAN?](https://upcgen.com/learn/what-is-ean): What is an EAN: 13-digit international retail barcode. How it differs from UPC, where it's used, how to get one from GS1.
- [What Is an FNSKU?](https://upcgen.com/learn/what-is-fnsku): What is an FNSKU: Amazon's FBA per-unit Code 128 label. How it differs from SKU and ASIN, how to print FNSKU labels.
- [What Is a GS1 Company Prefix?](https://upcgen.com/learn/gs1-prefix): GS1 Company Prefix: the unique number GS1 assigns to your brand. Pricing tiers, how to apply, what it unlocks.
- [GTIN vs UPC](https://upcgen.com/compare/gtin-vs-upc): GTIN vs UPC: the umbrella identifier vs the specific 12-digit format. When to use each term, Amazon's terminology.
- [QR Code vs Barcode](https://upcgen.com/compare/qr-code-vs-barcode): QR code vs barcode: 2D vs 1D, data capacity, scanner compatibility, and when to use each.
- [UPC vs SKU](https://upcgen.com/compare/upc-vs-sku): UPC vs SKU: GS1 global retail barcode vs internal inventory code. When you need both, how Amazon and Walmart treat them.
- [ISBN-10 vs ISBN-13](https://upcgen.com/compare/isbn-10-vs-isbn-13): ISBN-10 vs ISBN-13: 10-digit pre-2007 vs 13-digit post-2007. How to convert, which Amazon uses for ASIN.
- [ASIN vs UPC](https://upcgen.com/compare/asin-vs-upc): ASIN vs UPC: Amazon's 10-character internal product ID vs the global 12-digit GS1 barcode. How Amazon links them, when each matters, GTIN Exemption.
- [What Is GS1?](https://upcgen.com/learn/what-is-gs1): What is GS1: the global not-for-profit behind UPC, EAN, ITF-14, GS1-128, GS1 DataMatrix. Pricing tiers, why retailers require it, when it's not needed.
- [How to Make a Barcode](https://upcgen.com/learn/how-to-make-a-barcode): How to make a barcode in 4 steps: pick the format (UPC/EAN/Code 128/QR), enter data, generate, print. With GS1 vs internal-use guidance and sizing rules.
- [UPC Check Digit Calculator](https://upcgen.com/learn/upc-check-digit-calculator): UPC check digit formula (GS1 Mod 10): odd positions ×3, even ×1, sum, find next multiple of 10. Three worked examples. EAN-13/EAN-8/ITF-14 differences.
- [What Is a GLN?](https://upcgen.com/learn/what-is-gln): Global Location Number explained: 13-digit GS1 identifier for physical and organizational locations. Structure, EDI use, healthcare, DSCSA, vs GTIN vs SSCC.
- [What Is EPCIS?](https://upcgen.com/learn/what-is-epcis): EPCIS supply chain visibility standard: 4 event dimensions (what/when/where/why), 5 event types, 1.2 vs 2.0, DSCSA + EU FMD use, vs EDI.
- [What Is an SSCC?](https://upcgen.com/learn/what-is-sscc): Serial Shipping Container Code explained: 18-digit GS1 ID for one specific pallet/case/carton. Structure, GS1-128 encoding with AI (00), EDI 856 use, DSCSA aggregation.
- [Aztec Barcode](https://upcgen.com/learn/aztec-barcode): Aztec 2D barcode explained: bullseye orientation, no quiet zone, airline boarding passes (IATA BCBP), European rail (UIC 918.2), how it differs from QR/Data Matrix.
- [PDF417 Barcode](https://upcgen.com/learn/pdf417-barcode): PDF417 stacked linear barcode: US driver's licenses (AAMVA), boarding passes, DHL shipping. Structure, capacity, vs true 2D codes (QR/Data Matrix/Aztec).
- [What Is GTIN-14?](https://upcgen.com/learn/what-is-gtin-14): GTIN-14 explained: 14-digit case identifier with indicator digit (0-9), ITF-14 barcode format, how to convert UPC-A → GTIN-14, when retailers require it.
- [What Is GS1 Digital Link?](https://upcgen.com/learn/what-is-gs1-digital-link): GS1 Digital Link: encodes GTIN as web URL, scannable at POS or by phone. Sunrise 2027 industry target. Replaces/complements UPC with QR Code or Data Matrix.
- [How to Scan a Barcode or QR Code](https://upcgen.com/learn/how-to-scan-a-barcode): How to scan barcodes/QR codes with iPhone (iOS 17+ Camera native) and Android (Google Lens). 1D vs 2D format support, why scans fail, when hardware scanners are needed.
- [12-Digit Barcode (UPC-A)](https://upcgen.com/learn/12-digit-barcode): 12-digit barcode = UPC-A. Structure, why 12 digits, where it's used (US/Canada retail, Amazon, Walmart). Not all 12-digit barcodes are UPC but in retail context they are.
- [13-Digit Barcode (EAN-13)](https://upcgen.com/learn/13-digit-barcode): 13-digit barcode = EAN-13 (international/JAN-13/ISBN-13). Country prefix table, where used, how it relates to UPC-A (one leading zero added).
- [14-Digit Barcode (ITF-14, GTIN-14)](https://upcgen.com/learn/14-digit-barcode): 14-digit barcode = GTIN-14 rendered as ITF-14 on shipping cartons. Indicator digit, retailer requirements (Walmart, Costco, Carrefour), structure, why retailers require it.
- [8-Digit Barcode (EAN-8 / UPC-E)](https://upcgen.com/learn/8-digit-barcode): 8-digit barcode = EAN-8 (international small-package) or UPC-E (compressed UPC-A). Differences, where used, why small packaging needs them.
- [Where to Buy UPC Codes](https://upcgen.com/learn/where-to-buy-upc-codes): Two ways to buy UPC codes: GS1 directly (legitimate, $30+) or third-party resellers ($5-30, increasingly rejected by Amazon/Walmart). Pricing breakdown, which to choose by sales channel.
- [How Much Does a UPC Cost?](https://upcgen.com/learn/how-much-does-a-upc-cost): GS1 US 2026 UPC pricing: $30/1 GTIN one-time, $250+$50/yr for 10, $750+$150/yr for 100. International GS1 office pricing varies. Total cost of ownership.
- [What Is a SKU?](https://upcgen.com/learn/what-is-sku): Stock Keeping Unit explained: your internal product code. Differs from UPC (GS1 external), GTIN (umbrella term), MPN (manufacturer code). When to use each, how Amazon/Shopify/Walmart handle SKU vs UPC fields.
- [UPC vs Barcode](https://upcgen.com/compare/upc-vs-barcode): Common misconception: UPC IS a barcode, but not every barcode is a UPC. UPC is one specific 12-digit format; barcode is the umbrella for UPC, EAN, ISBN, Code 128, QR, Data Matrix, ITF-14, etc.
- [RFID vs Barcode](https://upcgen.com/compare/rfid-vs-barcode): RFID vs barcode: cost-per-tag, scan speed, range, read accuracy, when each makes economic sense. Passive UHF vs active vs HF.
- [Amazon FBA Barcode Requirements](https://upcgen.com/learn/amazon-fba-barcode-requirements): Amazon FBA barcode requirements 2026: GS1 UPC + FNSKU labels, GTIN Exemption, label specs, stickerless commingled inventory.
- [Walmart UPC Requirements](https://upcgen.com/learn/walmart-upc-requirements): Walmart Marketplace and Retail Link UPC requirements: GS1 verification, ITF-14 case codes, SSCC pallet labels, fixing rejections.
- [DSCSA Serialization](https://upcgen.com/learn/dscsa-serialization): DSCSA serialization requirements 2026: GS1 DataMatrix format, Stabilization Period, May 2026 deadlines, EPCIS aggregation.
- [DSCSA Compliance Checklist 2026](https://upcgen.com/learn/dscsa-compliance): DSCSA compliance after May 27, 2026 Stabilization end: 6-item checklist, who must comply, exemptions, penalties, DSCSA vs EU FMD, dispenser verification.
- [What Is an MPN?](https://upcgen.com/learn/what-is-mpn): What is MPN: Manufacturer Part Number. How it differs from UPC, SKU, and GTIN. Where to find it on packaging.
- [Amazon GTIN Exemption](https://upcgen.com/learn/amazon-gtin-exemption): Amazon GTIN Exemption: who qualifies, how to apply, why most applications get rejected, when to buy real UPCs instead.
- [Barcode Size and Placement](https://upcgen.com/learn/barcode-size-and-placement): GS1 barcode size standards, quiet zone requirements, where to place UPC on packaging, why barcodes fail to scan.

## Optional

- [About](https://upcgen.com/about): About UPCGen.
- [Terms of Service](https://upcgen.com/terms): UPCGen terms of service.
- [Privacy Policy](https://upcgen.com/privacy): UPCGen privacy policy.

## Languages

Available in English (default at /), Spanish (/es), Italian (/it), Chinese (/zh), Japanese (/ja), Korean (/ko), French (/fr).