PasteOps

Filter lines by prefix option

any languageMulti-step

Keep lines that start with the prefix supplied in the option input.

0/500000Drop .txt, .html, .md, .csv, or .json files here.

0/500000

Output appears here after you run the tool.

Max input 500000 chars · Worker timeout 2s · Offline runtime

About this tool

Filter lines by prefix option: Keep lines that start with the prefix supplied in the option input.

Use cases

  • Run the multi-step transform described by “Filter lines by prefix option” in one click
  • Turn a repetitive manual cleanup into a shareable stable URL
  • Clean pasted text, then copy it into the destination app
  • Reuse the same deterministic transform across a team

How to use it

  1. Paste source text into Input.
  2. Fill the Option field if needed, then click Run or wait for auto-run.
  3. Copy the Output, or download when you need a file.

Notes

  • Everything runs in your browser; your text is never uploaded to a server.
  • Deterministic transform: the same input and options always yield the same output—no AI rewrite.
  • Keep a single run within the tool limit (about 500000 characters); larger payloads may time out.

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