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H5P Package Checker (.h5p Preflight)

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Checks .h5p e-learning packages against the published H5P file specification: h5p.json and library.json fields, bundled library versions, content.json, file types, missing image alt text and oversize files. One report row per package, plus HTML/Markdown report.

Pricing

Pay per usage

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0.0

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Developer

Madrasco

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Total users

Monthly active users

3 hours ago

Last modified

0.1.6 (candidate, 2026-09-26)

Fix: the alt-text check now follows images inside a one-field group whose stored value is a content object (H5P stores such groups without the wrapper). Before, it skipped the slides of an Image Slider and the pages of an Interactive Book: on the H5P.org Image Slider example 0 of 4 images were checked (now 4 of 4); on a public Interactive Book 1 of 31 images were checked (now 31 of 31, 18 of them marked decorative). No other finding changed on 18 outside packages.

0.1.5 (2026-09-26)

A missing editor library (editorDependencies not bundled) is a warning: H5P's upload check refuses such a package unless the site already has the library.

0.1.3 (2026-09-25)

First public release: 36 cited rules on h5p.json, library.json, dependencies, content.json, file types, image alt text and size.

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Offline structural and deterministic content preflight for FPA12, FPR12, and FSM10 XML with pinned derived schemas and structured findings. Italian e-invoicing preflight before SDI submission: catches technical errors that commonly cause an SDI scarto, without claiming SDI acceptance.

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Audit pypi package release monitor inputs and return structured findings, evidence rows, and a buyer-ready report for SEO, developer, and operations teams.

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Before refreshing a product feed, sample public product pages and compare observable price, stock, image, and structured-data signals against feed rows.

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