Finnish Toolkit — Y-tunnus & VAT

Unknown author · Tools

Open in Chrome Web Store

Users

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Avg rating

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Ratings

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Updated

Jun 17, 2026

Media

1 item

Description

Validate Finnish Business IDs (Y-tunnus) and VAT numbers, look up companies, and autofill business forms. Runs locally. Finnish Toolkit speeds up everyday Finnish business admin. Validate a Y-tunnus (Business ID) instantly with the official checksum, convert it to a VAT number, and autofill business details into forms. • Y-tunnus validation (official PRH algorithm) • VAT-number conversion and checking • One-click business lookup and form autofill Validation runs locally and instantly. Free for validation; an upgrade unlocks live PRH company lookup and bulk checks. Made in Finland for Finnish businesses, bookkeepers, and anyone filling in company forms.

History

30d 90d 1y all

rating_count is the Chrome Web Store ratings count, not a written-review count.

Details & SEO

SEO signals

Listing completeness signals

Title length
Characters in the extension name.
32
Description length
Characters in the listing description.
663
Media assets
Screenshots and videos on the listing.
1
Has promo video
Whether the listing includes at least one video.
No
Languages
Declared language locales.
1
Developer website
Listing exposes a developer website URL.
No
Contact email
Listing exposes a contact email.
Yes
Keyword in name
Case-insensitive substring match in the name.
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Keyword in description
Case-insensitive substring match in the description.
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Keyword occurrences in description
Count of case-insensitive occurrences in the description.
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Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
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These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.