This checker vs. Avalara
Two different shapes: Avalara is an ongoing cloud platform for calculating and filing tax, plus e-invoicing, across a business's whole operation. This page is a free, local, no-account check of one invoice file's fields and arithmetic before it goes anywhere near a submission network.
What each tool is for
Avalara is a cloud-based tax-compliance platform founded in 2004. It automates the end-to-end indirect-tax lifecycle — sales and use tax calculation, returns filing, exemption certificate management, VAT/GST across many countries, and e-invoicing — and integrates with ERP, accounting, and ecommerce systems most businesses already run. It is sold as an ongoing subscription account. Avalara's own current pricing is not reachable from this session to confirm today's plan names or dollar figures, so no price for it is invented here: only its well-documented identity and category — a cloud tax-compliance platform sold as a subscription account — are stated, and no dollar amount for Avalara appears on this page.
This checker does none of what Avalara does. It does not calculate tax owed, file a return, manage exemption certificates, or transmit anything to a tax authority or exchange network. It reads one invoice file — JSON, UBL XML, UN/CEFACT CII (XRechnung CII / Factur-X), or a Factur-X / ZUGFeRD / XRechnung PDF — either dropped into the browser or piped through the CLI, and reports the specific fields, VAT arithmetic, IBAN/BIC/RF digits, or payment instructions that would fail, each with a rule ID and a suggested fix, plus a downloadable remediation CSV. It runs free, keeps no account, and uploads nothing you drop or paste — the browser page never contacts a server. It is a preflight observation, not a declaration that an invoice is legally valid or ready to submit.
| Question | Where to answer it |
|---|---|
| I need to calculate sales/use tax or VAT across jurisdictions and file returns. | Avalara, or a comparable tax-compliance platform — that is not something this checker does. |
| Would this specific JSON, UBL, CII, or Factur-X invoice file pass validation before I submit it? | This checker — free, instant, local, no account. |
| Which exact field, total, or VAT digit is wrong, and what is the fix? | This checker's rule IDs (INV-001 through INV-054) and its rule reference. |
| I need exemption-certificate management or a compliance network integration into my ERP. | Avalara, or a comparable platform. |
| How is a mixed-VAT-rate tax breakdown actually calculated? | This checker's own worked example. |
| Do I need to create an account or sign up to use the tool? | This checker: no. Avalara is used through a subscription account. |
Most teams get different value from each: Avalara (or a comparable platform) for calculating and filing tax and routing e-invoices across an entire operation as an ongoing subscription, and a free local checker like this one for an instant, no-login answer to whether one specific invoice file is well-formed before it reaches that pipeline. This page's own rule IDs are a preflight observation, not a tax or legal determination.
This tool needs no account and no sign-in: it is a static page, the checks run in your browser (or locally via the CLI), and once the page has loaded it keeps working with the connection off.
Common questions
Should I use this checker or Avalara?
They do different jobs, and a business that files real returns will likely end up using something like Avalara alongside a tool like this one, not instead of it. Avalara is a cloud tax-compliance platform founded in 2004, covering sales and use tax calculation, returns filing, exemption certificate management, VAT/GST, and e-invoicing across many countries, sold as an ongoing subscription account and integrated into ERP, accounting, and ecommerce systems. This checker does one narrower thing: it reads a single JSON, UBL, CII (XRechnung), or Factur-X/ZUGFeRD PDF invoice you drop into the browser or pipe through the CLI, and reports which specific fields, totals, VAT arithmetic, or payment instructions would fail — with a rule ID and a plain-language fix — before you submit it anywhere. It runs free, keeps no account, submits nothing to a tax authority or exchange network, and uploads nothing you drop. A business that needs to calculate tax across jurisdictions, file returns, manage exemption certificates, or route e-invoices through a compliance network needs Avalara or a comparable platform; a developer, bookkeeper, or ERP integrator who wants an instant, local answer to "would this specific invoice file pass" before it reaches that network is in the right place here.
Is this page affiliated with Avalara?
No. This site is not affiliated with, endorsed by, or sponsored by Avalara. Avalara is a trademark of its owner, named here only to describe what this checker is and is not.
Open the E-invoice Preflight checker to validate your own invoice file.