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Regex Tester

Validate your regular expressions with dynamic highlights.

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Regex Tester

Regex testerJS engineOn-device processing

Test patterns, read groups, and transform text without leaving the browser.

Matches
2
Flags
gmu
Reading
Direct
Batch
2 docs
01

Pattern and presets

Expression and presets
Regular expression
Presets
Flags
02

Text and reading

Input text
Preview with highlights
contato@exemplo.com.br admin@teste.io
03

Result

Found
Match 1
contato@exemplo.com.br
0 → 22
Match 2
admin@teste.io
23 → 37
04

Advanced analysis

Replace and split
Replace template
Replace preview
contato@exemplo.com.br admin@teste.io
Split preview
Document batch
Batch
Documento 1
0 matches
No match
Documento 2
0 matches
No match
Sobre

What is Regex Tester?

Por Quorify EditorialAtualizado em

Quorify's Regex Tester validates your regular expressions with dynamic highlighting. Processing happens locally in the browser via native APIs—useful when you need to handle sensitive data (tokens, secrets, production payloads) and prefer not to paste into online tools that send data to external servers. Follows industry-recognized standards (IETF RFCs, W3C, MDN). Part of the Quorify dev toolkit—combine with other validation, conversion, and formatting tools to accelerate debugging, API integration, and project setup. Processing occurs locally, with no payload upload to external servers at this stage. For details on data handling, see our Privacy Policy.

Casos

When to use

  1. Quick debugging during API integration, without needing to open Postman or CLI tools.

  2. Validate payloads before submitting to production, avoiding 400 errors with generic messages.

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

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

  5. Technical customer support—validate received input before creating a product team ticket.

Método

How it works

Regex Tester uses native browser APIs (Web Crypto, JSON, URL, TextEncoder) that implement official recognized standards (IETF RFCs, FIPS, ECMA). There's no dependency on heavy libraries or external servers. For the complete breakdown on data handling, see our Privacy Policy.

FAQ

Frequently asked questions

Does processing involve an external server?
No. Regex Tester uses native browser APIs. Provided payloads are processed locally.
Can I use it with sensitive data (tokens, secrets)?
Yes, because processing is local. Still, avoid pasting real credentials into any web tool—always use staging environments or dummy variables for testing.
What standard is followed?
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?
After loading the page once, you can continue using the tool offline.
Is there a size limit?
The browser supports payloads in the hundreds of MB in memory, but web tools typically 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 all browsers.

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

    RFC Documents

    The official repository of 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

Starting at$4.08/mo
See plans

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