Text containment check

Client

Substring check for log grep workflows.

About Text containment check

Test whether A contains B as substring (case sensitive toggle via lower). Processing runs in your browser—Toolcore does not need your paste for the core operation on this page.

Deterministic string metrics only; rephrased text may score differently than human judgment.

How to use

Paste or type in the main field, then read the output below. Use Load example when available, or open the page with ?q= / ?qb= so tickets and agents share the same input.

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Nearby workflows on Toolcore

  • Extract URLs — Pull http and https links from pasted text—copy the list locally; no link checker. Useful when a second similarity metric helps decide deduplication.
  • Find and replace — Find and replace literal text or regex matches in a paste—case options and replace-all, browser-only. Useful when a second similarity metric helps decide deduplication.
  • Jaccard similarity — Word-token Jaccard index between two texts—optional case folding, in your browser. Useful when a second similarity metric helps decide deduplication.
  • Remove duplicate characters — Drop repeated characters while keeping first-seen order—optional case folding—in your browser. Useful when a second similarity metric helps decide deduplication.

Common use cases

  • Text containment check for quick local checks without uploading data.
  • Copy results into tickets, docs, or classroom notes.

Common mistakes to avoid

  • Unexpected input shape

    See the intro and how-to notes for accepted formats.

FAQ

Is processing local?

Yes—this runs entirely in your browser.

Agent prefill?

Use q or qb for the main text field when supported.

More tools

Related utilities you can open in another tab—mostly client-side.