Inspectors

Line Filter (grep)

Paste text and filter lines based on a search pattern. Works like grep but with a visual interface — you see the matching (or non-matching) lines in real time. Supports plain text matching, keyword matching (multiple terms), and full regex. Toggle between include mode (show matching lines) and exclude mode (show non-matching lines).

Line Filter (grep) — Filter lines by plain text, keywords or a regex — like grep, but visual

What it does

  • ▸Filters lines by plain text substring match
  • ▸Filters by multiple keywords (comma-separated, OR logic)
  • ▸Filters by regular expression with full regex syntax
  • ▸Include mode shows matching lines; exclude mode shows non-matching lines
  • ▸Case-sensitive or case-insensitive matching
  • ▸Shows match count and total line count

Use cases

  • ▸Filtering log lines for a specific error or warning message
  • ▸Extracting lines containing a specific IP or URL from a log file
  • ▸Excluding commented lines from a configuration file
  • ▸Finding lines that match a pattern in a data export

How it works

1

Paste your text into the input pane

2

Enter a search pattern (plain text, keywords, or regex)

3

Choose include or exclude mode

4

Matching lines are displayed in the output pane

Frequently asked questions

1How is this different from grep?

It's grep with a visual interface. You see the input and output side by side, and the filter updates in real time as you type. It supports the same pattern matching (plain text, regex) but is easier to iterate on than command-line grep.

2What's keyword mode?

In keyword mode, you enter multiple terms separated by commas. A line matches if it contains any of the terms (OR logic). This is useful for filtering log lines for multiple error codes or message types at once.

3Can I use this in a pipeline?

Yes. Chain it after a log normalizer to filter for specific entries, or before a line sort to work with only the matching lines. The pipeline builder lets you connect multiple tools into a single flow.

Related tools

Line Sort/Dedupe — Sort, deduplicate, reverse and trim lines of text

Line Sort/Dedupe

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RegExp Tester — Test a regular expression against a string, inspect matches and groups

RegExp Tester

Test a regular expression against a string, inspect matches and groups

List Comparer — Set operations on two lists — intersection, union, differences

List Comparer

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Data / IOC Extractor — Pull emails, URLs, IPs, domains, hashes, UUIDs and MACs out of any text

Data / IOC Extractor

Pull emails, URLs, IPs, domains, hashes, UUIDs and MACs out of any text

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