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User-Agent Parser

Analyze User-Agent strings: browser, OS and device.

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User-Agent Parser

Decode User-Agent strings and identify browser, OS, engine, and device type without sending any data.

Browser
—
OS
—
Engine
—
01

User-Agent String

Click Analyze User-Agent to decode the string above.

Your browser's User-Agent has already been loaded. Replace it with one from any HTTP request to analyze.

Sobre

What is the User-Agent Parser?

Por Quorify EditorialAtualizado em

Quorify's User-Agent Parser analyzes User-Agent strings: browser, operating system, and device. Processing happens locally in your browser via native APIs — useful when you need to handle sensitive data (tokens, secrets, production payloads) and would rather not paste them into online tools that send data to external servers. It follows industry-recognized standards (IETF RFCs, W3C, MDN). Part of the Quorify dev kit — combine it with other validation, conversion, and formatting tools to speed up debugging, API integration, and project setup. Processing runs locally, with no payload upload to external servers at this stage. For details on data handling, see our Privacy Policy.

Casos

When to use it

  1. Quick debugging during API integration, without having to open Postman or a CLI tool.

  2. Validate payloads before pushing to production, avoiding generic 400 errors.

  3. Initial project setup — generate identifiers, format configs, and validate syntax.

  4. Review data in production logs, spotting patterns and errors visually.

  5. Technical customer support — validate incoming input before opening a ticket with the product team.

Método

How it works

The User-Agent Parser uses native browser APIs (Web Crypto, JSON, URL, TextEncoder) that implement officially recognized standards (IETF RFCs, FIPS, ECMA). There's no heavy library or external server dependency. For full details on data handling, see our Privacy Policy.

FAQ

Frequently asked questions

Does processing involve an external server?
No. The User-Agent Parser uses native browser APIs. Payloads you provide are processed locally.
Can I use it with sensitive data (tokens, secrets)?
Yes, since processing is local. Even so, avoid pasting real credentials into any web tool — always use staging environments or dummy values for testing.
Which standards does it follow?
As applicable: IETF RFCs (JSON, UUID, URI), W3C (HTML, CSS), FIPS (cryptography), ECMA (JavaScript). See the Sources section for specific references.
Does it work offline?
Once the page has loaded once, you can keep using the tool offline.
Is there a size limit?
Browsers can handle payloads on the order of hundreds of MB in memory, but web tools tend to slow down above ~10 MB. For large files, use specialized CLI tools.
Is it compatible with older browser versions?
We recommend using current versions (Chrome, Firefox, Safari, Edge from the last 2 years). Modern features (Web Crypto, etc.) may not be available in older browsers.
Fontes

Official sources

Tabelas, leis e referências consultadas para fundamentar esta ferramenta.

  1. Technical documentationCurrentMDN Web Docs · Mozilla

    Web Standards

    The world's most consulted reference for web standards — JavaScript APIs, HTML, CSS, and browser protocols.

    Consultar fonte oficial
  2. International standardCurrentWorld Wide Web Consortium (W3C)

    W3C Standards

    The organization that defines official web standards — HTML, CSS, ARIA, and other specifications implemented by every browser.

    Consultar fonte oficial
  3. International standardsDatatrackerIETF · Internet Engineering Task Force

    RFC Documents

    The official repository for Request for Comments (RFCs) — technical documents that define internet protocols and formats (HTTP, JSON, URI, UUID, etc.).

    Consultar fonte oficial

Metodologia — esta ferramenta consulta as tabelas e legislação vigentes nas fontes acima. As regras são atualizadas conforme novas instruções normativas são publicadas pelos órgãos competentes.

Última verificação editorial: junho de 2026.

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SponsoredQuorify · free plan
Quorify Pro

Use Quorify without limits

100 uses/day across all 125 tools · ad-free · extended history

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