Frequently asked questions about OnSubmit

OnSubmit groups generators, validators, converters and calculators for development, PDFs, images, text, finance, test data and QA workflows.

Use the catalog page to search by name, format, need, keyword or business entity. Try IBAN/BIC, fake RIB, JSON, PDF, UUID, Regex, VAT or SIRET.

A generator creates synthetic data, a validator checks local rules, a converter transforms the input and a calculator applies a displayed formula and assumptions.

No for current catalog tools: text and files are processed in the browser and are not sent to the OnSubmit API. The contact form is a separate request.

Avoid pasting real secrets into any public tool. For JWT, hashes, .env files and passwords, use test values or anonymized data.

No. Fictitious data is for mockups, forms, fixtures, QA tests and demos. It should not represent a real person, company or bank account.

A valid format satisfies length, character and checksum rules. A real value must also be assigned, active or recorded by the relevant bank, registry or authority.

Unless explicitly stated, they perform local structural checks. VIES, INSEE, banks and other registries are still required to confirm existence or status.

They apply the displayed formulas, rates and assumptions. Rounding, fees, insurance, tax and contractual terms can change the final amount, so the result remains an estimate.

Use the contact page and describe the need, target users, formats to support, examples and related OnSubmit tools.

Yes. The contact page is for bugs, calculation errors, mobile issues, content improvements and useful links between tools.

Yes. Sponsorship can apply to a tool page, category or workflow when it is clearly identified and useful to the audience.