
VatStack
vatlayer API
Taxid.dev
VIESAC
Lookuptax
VATnode.dev
The VAT API
Justaxit validates lists of EU VAT, UK EORI and South African VAT numbers in bulk against VIES, HMRC and SARS, returning company names, addresses and exportable results.

JavaScript Operator Lookup
JavaScripting
Let's write robust, well-tested, modular JavaScript code.
Which is more popular?
Website, pricing, platforms and company facts side by side.
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| Website | app.justaxit.com | mjavascript.com |
| Pricing | ||
| Company | Startup from Poland · 1 - 9 employees | — |
| Listed in |
In their own words, as submitted to SaaSHub.


Checking a supplier list against the EU VIES website means pasting one VAT number at a time, waiting, copying the result back into Excel, and repeating it a few hundred times. Justaxit turns that into one paste and one click. Paste a column of VAT numbers straight from Excel and Justaxit...
No description of Modular JavaScript yet.
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


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Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


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A full list of JavaScript operators with examples
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Ranking of top JavaScript libraries, frameworks, and plugins
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TaxID is a developer-first API to validate VAT and tax IDs across 31 countries — 27 EU member states via VIES, plus UK, Switzerland, Norway, and Australia. Stripe-style errors, JSON responses, 100 free validations/month.
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EU VAT validation with audit-proof VIES certificates
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