How to use: Regex Replace Tool

Regex Replace Tool is a free online Regex Tools tool that apply regex replacements with $1 capture references instantly in your browser. Paste your data, adjust the options and get the result in real time — no installation, no sign-up, and nothing is ever uploaded to a server.

Input Regex Replace Tool Output Runs 100% in your browser — your data never leaves your device.
Regex Replace Tool — Input → Output. Runs 100% in your browser — your data never leaves your device.

How to use

Using Regex Replace Tool takes three steps:

  1. Paste your data into the input box (or load the example).
  2. Configure the options to match your target format or scenario.
  3. Copy, download or inspect the output — it updates live as you type.
How to use · Regex Replace Tool 1 Input Paste your data intothe input box (or loadthe example). 2 Options Configure the optionsto match your targetformat or scenario. 3 Output Copy, download orinspect the output —it updates live as youtype.
How to use — 3

Description

Apply regex replacements with $1 capture references.

Because everything is computed client-side, Regex Replace Tool is safe to use with sensitive data such as API keys, tokens or private logs.

Run

These ready-made examples show typical inputs and the exact output Regex Replace Tool produces for them.

Examples

Reformat dates with $1 etc.

2026-09-10 and 2025-01-31

Use cases

Common situations where Regex Replace Tool helps:

  • Apply regex replacements with $1 capture references.
  • Because everything is computed client-side, Regex Replace Tool is safe to use with sensitive data such as API keys, tokens or private logs.

FAQ

What is Regex Replace Tool?

Regex Replace Tool apply regex replacements with $1 capture references. It runs entirely in your browser, so your data stays private.

Is Regex Replace Tool free to use?

Yes. Regex Replace Tool is free, unlimited and works without registration or installation.

Does my data get uploaded?

No. All processing happens locally in your browser; nothing is sent to any server.

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