🔍 Filtering

Keep Lines Starting With

Isolate every URL that starts with https://, or every keyword that starts with “how to”, in one step.

  • 100% free, no limits
  • No sign-up
  • Your data never leaves your browser
  • Results in under a second
Use the Keep Lines Starting With tool now ↓ Open it in the full Notepad

Free tool Paste your list — the Keep Lines Starting With tool does the rest

The example below is already loaded, so you can see exactly what you get. Replace it with your own list and the result updates as you type.

Got a bigger job? The full Notepad runs the same engine on lists of any size — chain this with dedupe, sort and filter, undo any step, and save the whole routine as a recipe for next time.

Example Keep Lines Starting With tool: before and after

Before
https://example.com
example.com/page
https://example.com/blog
After
https://example.com
https://example.com/blog

How it works What the Keep Lines Starting With tool does

Keeps only lines that begin with your chosen text, such as isolating every URL that starts with "https://".

3 steps How to use the Keep Lines Starting With tool

  1. Paste your list into the box above — one item per line. Keyword exports, crawl exports and spreadsheet columns all work.
  2. Check the settings and adjust them to your job — the result updates as you type.
  3. Copy the result and paste it wherever it needs to go. Nothing is uploaded, so client and confidential data stay on your machine.

Use it to When to use the Keep Lines Starting With tool

  • Isolate every absolute URL that begins with https://
  • Keep only entries that start with a specific category prefix
  • Filter a list down to a specific language or region code prefix

FAQ Keep Lines Starting With tool questions

Is this tool free to use?

Yes. Keep Lines Starting With runs entirely in your browser below, with no sign-up, no limits, and nothing sent to a server.

Can I use this to filter by URL protocol?

Yes — enter "https://" as the match text to isolate secure URLs from a mixed list.

Pairs well with More Filtering tools, all free

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🔍 Remove Lines with Numbers

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🔍 Keep Lines with Numbers

Find every “2025”, model-number and price keyword in a list in one step, so you can update or target them.

Stop fixing lists by hand

The Keep Lines Starting With tool is one of the free tools inside Seowolf’s Notepad. Paste a list once, then dedupe, filter, sort, compare and format it in seconds — every step undoable, nothing uploaded, no account.

Open the Notepad — it’s free
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