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About Regex Match Highlight Viewer
The Regular Expression Match Highlighter & Text Inspector renders live, multi-color overlay highlights on matched text spans, displaying start/end byte indices, match lengths, and captured group tooltips in real time.
How to Use Regex Match Highlight Viewer
Step 1
Enter your regex pattern and flags (e.g. `/\b[A-Z]{3,}\b/g`).
Step 2
Paste multi-line target text into the inspector.
Step 3
Hover over highlighted text badges to view match coordinate metadata.
Step 4
Click "Copy Match Summary".
Practical Use Cases for Regex Match Highlight Viewer
Auditing Complex Regex Matches in Long Documents
Visually verify which sections of articles, HTML source code, or server logs match regex patterns before executing automated find-and-replace routines.
Inspecting Overlapping & Consecutive RegExp Matches
Diagnose zero-width assertion positions and consecutive word boundary matches with interactive colored highlight blocks.
Input & Output Examples
Highlighting Markdown Links
Pattern: `\[([^\]]+)\]\(([^\)]+)\)` | Text: "Check [RenderXD](https://renderxd.com) today!"
Highlight: `[RenderXD](https://renderxd.com)` [Indices 6-38] | Group 1: "RenderXD" | Group 2: "https://renderxd.com"
Key Features & Performance
- ✓Multi-color alternating highlight badges for consecutive matches.
- ✓Interactive hover tooltips displaying Match Index, Length, and Capture Group values.
- ✓Match statistics dashboard: Total Matches, Character Count, and Processing Time.
- ✓100% Client-Side memory execution.
- ✓1-Click Export highlighted HTML or match index list.
Key Terminology & Definitions
Match Coordinates
The zero-indexed starting and ending character positions of a matched substring within the source string.
Zero-Width Match
A regex match that consumes zero characters (e.g. `\b` or `(?=abc)`), occurring between adjacent characters or at string boundaries.