Barcode Check Digit Checker

Store Positioning

Store title: Barcode Check Digit Checker

Short description: Check barcode check digits for common product identifier formats and explain which rows fail validation.

SEO title: Barcode Check Digit Checker — fast deterministic data utility

SEO description: Check barcode check digits for common product identifier formats and explain which rows fail validation. Use it for fast, low-cost normalization or validation at scale with predictable pay-per-event pricing.

Categories: DEVELOPER_TOOLS, ECOMMERCE

Keywords: barcode, check, digit, checker, tiny deterministic utility

Pay-Per-Event Pricing

This actor uses pay-per-event pricing. Event prices include Apify platform usage; users are not expected to pay a separate platform-usage pass-through charge for the configured pricing model.

• Tier: U1 — Tiny deterministic utility
• Primary event: identifier-validated at $0.00195 base
• Default max charge: $1.00
• Store discounts: FREE/BRONZE base, SILVER discounted, GOLD deepest approved discount

Event set:

• actor-start: base $0.00176, GOLD $0.00141. Barcode Check Digit Checker: charged when actor start is completed. The price includes Apify platform usage; no separate usage pass-through is intended.
• identifier-validated: base $0.00195, GOLD $0.00156. Barcode Check Digit Checker: charged when identifier validated is completed. The price includes Apify platform usage; no separate usage pass-through is intended.
• report-generated: base $0.02000, GOLD $0.01600. Barcode Check Digit Checker: charged when report generated is completed. The price includes Apify platform usage; no separate usage pass-through is intended.

The actor accepts actor-start before work, accepts the primary event before each dataset row, and accepts the configured report event before writing report files. If maxChargeUsd or the live PPE limit blocks a charge, the corresponding row or report is not written.

Public Task Concepts

• Audit Barcode Check Digit controls on a capped public sample
• Find high-priority Barcode Check Digit issues before release
• Validate Barcode Check Digit evidence from supplied pages
• Prioritize Barcode Check Digit fixes with severity and proof
• Export Barcode Check Digit QA rows for client review Validate barcode check digits and explain row failures.

What It Does

Computes expected digits for GTIN-8/12/13/14, ISBN-10, and ISBN-13, then reports expected vs actual check digit and exact error type.

Inputs

This actor exposes these input fields in .actor/input_schema.json:

• inputRows
• fileUrl
• codeColumn
• formats
• maxRows
• includeValidRows
• strictMode
• maxChargeUsd

The exact default checks the public ISBN-10/ISBN-13 edition pair 0-306-40615-2 and 978-0-306-40615-7, verified through Open Library at 2026-07-12T05:48:00Z.

Outputs

Dataset rows contain:

• rowIndex
• originalCode
• normalizedCode
• detectedFormat
• expectedCheckDigit
• actualCheckDigit
• checkDigitValid
• errorType
• recommendation

Sample outputs in examples/output.sample.json and output.sample.json were generated from examples/input.tiny.json through actor logic.

Reports

After the configured report charge is accepted, the actor writes its Markdown, JSON, or CSV reports to the key-value store. A rejected report charge leaves those files unwritten.

Public Task Concepts

• Normalize Barcode Check Digit Checker records
• Validate Barcode Check Digit Checker values in bulk
• Generate a small utility report for Barcode Check Digit Checker

Safe use

Use small capped runs first. Network paths are bounded; review output quality and costs before increasing limits.