WebUtils
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Developer Workflow

Deduplicate lines from lists and logs

Remove repeated lines from copied IDs, URLs, logs, spreadsheets, and checklists, then sort or count the cleaned result before sharing or importing.

Open Remove Duplicate Lines

Problem

Repeated rows often appear after copying spreadsheet columns, combining logs, exporting IDs, merging checklists, or collecting URLs from multiple places. Manual cleanup is slow, and deleting the wrong row can remove a value that should stay in the final unique list.

When to use this

  • A pasted list contains repeated IDs, URLs, email addresses, names, or checklist items.
  • A log excerpt includes repeated messages and you need one representative line per unique message.
  • A spreadsheet column or exported list needs to be cleaned before sorting, counting, importing, or sharing.

Steps

  1. Step 1

    Paste the full list or log excerpt

    Use the complete copied block so duplicate detection sees every repeated row instead of only a partial sample.

  2. Step 2

    Remove empty rows first

    Clean blank lines before deduplication so empty rows do not count as repeated data or distract from the useful values.

  3. Step 3

    Remove duplicate lines

    Run duplicate-line removal to keep one copy of each repeated row. Preserve original order when chronology matters, or sort later when order does not matter.

  4. Step 4

    Sort the unique output when needed

    For IDs, URLs, names, and exports, sorting after dedupe makes the final list easier to scan and compare.

  5. Step 5

    Count the final rows or words

    Use a word or line count after cleanup to confirm how many unique values remain before importing or publishing.

Example

Deduplicate copied issue IDs

Input

BUG-104
BUG-104
BUG-208
BUG-315
BUG-208
BUG-401

Output

BUG-104
BUG-208
BUG-315
BUG-401

Common mistakes

Deduplicating before normalizing rows

Rows with extra spaces or different casing may not match. Clean obvious spacing or casing differences before expecting perfect duplicate detection.

Sorting logs before checking chronology

Sorting can destroy the original time order of a log excerpt. Keep original order when sequence matters for debugging.

FAQ

Does duplicate-line removal keep the first occurrence?

For ordered cleanup, keep the first useful occurrence so the output stays close to the source order while repeated rows are removed.

Should I sort before or after removing duplicates?

Usually remove duplicates first, then sort. Sorting after dedupe is easier to review because repeated rows have already been collapsed.

Can this be used for private lists?

Yes. The text cleanup workflow runs in the browser, but you should still avoid pasting secrets, credentials, or confidential customer data unless you have permission.