Find Patterns in a List

Need to filter a list based on a keyword, phrase, or advanced regex? The Find Patterns in a List tool makes it fast and dead simple. Paste your data, type a pattern, and instantly see which lines match all in your browser.

It works whether you’re searching for simple words or running complex regular expressions. You control whether matches are case-sensitive, if blank spaces should be trimmed, and whether to invert the match to return only non-matching lines.

Perfect for developers, editors, SEO specialists, and data wranglers who work with logs, content blocks, spreadsheets, and giant text dumps.

How to Use:

Paste your list into the input box. This tool will scan each line and filter out those that match your chosen pattern.

Pattern Input:

Use the pattern box above the options to type what you want to match. Examples:

• apple
• ^A (starts with A)
• \d{3} (three-digit number)

Match Modes:

• Regex (default): For advanced pattern matching using regular expressions
• Plain Text: Just checks if the line contains your keyword or phrase

Options:

• Case Sensitive: Keeps “Apple” and “apple” separate
• Trim Lines: Strips spaces at the start/end of each line before checking
• Invert Match: Returns lines that don’t match the pattern handy when you’re excluding values

The results update live, and the Matches counter shows how many lines hit the pattern. Use “Copy” to copy them instantly, or export to save them as a file.

What Find Patterns in a List can do:

The Find Patterns in a List tool is built to help you quickly filter, extract, or exclude content from large blocks of text based on patterns. You can use it to search logs, scrape line matches from datasets, find keywords in content, or clean up exports with just a few clicks.

Whether you’re trying to match product SKUs, find email addresses, filter error codes, or identify rows containing specific tags, this tool makes the process easy and fast. The pattern search supports both plain text filtering and full regular expressions, so it’s perfect for both beginners and advanced users.

Want to remove lines that contain “error” or “404”? Just toggle Invert Match and enter your pattern. Looking for all rows that start with a capital letter or contain three-digit numbers? Use the regex mode with something like ^[A-Z] or \d{3} and watch the matching results appear live.

You can also search case-sensitively to distinguish between terms like “ID” and “id” or match words only at the start or end of each line using patterns like ^apple or banana$. When working with messy exports or copied lists, the Trim Lines toggle ensures extra spaces don’t mess with your results.

Say you paste this:

Apple pie
Banana bread
Cherry tart
apple crisp
Banana milkshake
apple turnover

And your pattern is apple.

With Regex mode on and case sensitivity off, you’ll see:

Apple pie
apple crisp
apple turnover

Turn Invert Match on, and it’ll return everything except those:

Banana bread
Cherry tart
Banana milkshake

Now switch to Plain Text mode and match something like “milkshake” and only that line comes through.

Simple to use, but powerful when you need control.

Find Patterns in a List Table:

This table helps you understand how different settings affect the matching behavior. You’ll see exactly what gets filtered and why no guessing.

Common Use Cases:

Use it to filter logs, clean exports, test regex against real-world data, or pull keyword-matching content from huge lists. It’s simple, fast, and works right in your browser no installs, no tracking.