AdBlock Filter Analyzer

This is a tool into which you can copy/paste AdBlock filters (also known as Static Filter Syntax). It'll color code and it'll give you an explanation of what every piece of syntax does. Good for learning. Best viewed on desktop/laptop so you can hover over code and see the definition.

LineCount: ProcessTime:

Hover over code with your mouse to see definition.

Show Error Details

Error Details:

List Of Categories

Want to report a bug or request a feature? Create an issue on our GitHub.

Reference Documents

AdBlockPlus - How To Write Filters
uBlockOrigin - uBlock Origin's additions to the AdBlock language
uBlockOrigin - uBlock Origin's JavaScript Scriptlet Syntax
uBlockOrigin - uBlock Origin's cosmetic filters
AdBlockPlus - Filter Cheat Sheet
AdGuard - How to create your own ad filters

Features

Mainly a code coloring and learning tool. But does some validation too.
Handles very large files (30,000 lines will take a couple of seconds, but will parse)
Gives an error count and detailed error report
Colors 29 different kinds of syntax
Checks for some common errors
Validates RegEx
Checks options and uboScriptlets against a list of valid functions, marks as error if not found.
Colors and error checks as you type