ToolsXpo

Sub-string Extractor

Extract substrings from lines of text using indices or custom boundary markers.

Configuration

This tool has an API.Automate it from your code — 1 credit/call.Open in Playground
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How to use Substring ExtractorEvery option explained, a worked example, and what to check when the output looks wrong.Read the guide

About Sub-string Extractor

Extract substrings from lines of text using indices or custom boundary markers. It's built for string manipulation and text-processing tasks, runs instantly, and works on any device — no install, no sign-up.

How to use Sub-string Extractor

  1. Paste or type your input into the editor on the left.
  2. Leave the defaults, or tweak them if the tool exposes options.
  3. The result appears instantly on the right — everything runs in your browser, so nothing is uploaded.
  4. Copy the output, or download it, and you're done.

Why use Sub-string Extractor?

  • Fast and local — the transform happens in your browser, so there's no round-trip and no waiting.
  • Private by default — your input never leaves your device.
  • Accurate — the same, well-tested logic powers both this page and the public API.
  • Free — unlimited use in the browser, with an optional API for automation.

Use it from the API

Everything this page does is also available as a REST endpoint, so you can call Sub-string Extractor from your own code, a script or a CI pipeline.

Bash
curl "https://api.toolsxpo.com/v1/substring-extractor" \
  -H "Authorization: Bearer txp_live_YOUR_KEY"

The endpoint returns a JSON envelope ({ ok, data, meta }) and costs 1 credit per successful call. Try it in the playground or browse the full API reference.

Frequently asked questions

Is Sub-string Extractor free to use? Yes — use it in the browser as much as you like. The optional API has a free tier and pay-as-you-go pricing for heavy or automated use.

Is my data private? Yes. Sub-string Extractor runs entirely in your browser — your input never leaves your device and nothing is logged or stored.

Can I automate Sub-string Extractor? Yes — call the substring-extractor API endpoint from any language and script it into your workflow.

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