UD5 Toolkit
PDF Text Cleaner – Online Fix Broken Lines & Hyphens
Paste text copied from a PDF and remove unwanted line breaks, hyphenation, and extra spaces.
Find & Replace Text - Online String Replacer Tool
Find & Replace Text
Quickly search and replace text online. Supports case sensitivity, whole word matching, and regular expressions.
Frequently Asked Questions
It is an online utility that lets you search for specific text within a body of content and replace it with another string. You can use plain text or regular expressions, control case sensitivity, and match whole words only.
When enabled, the tool only matches the exact word, not parts of a word. For example, searching "cat" won't match "category" or "scatter". This option is ignored when using regular expressions.
Yes, check the "Use Regex" box and enter a valid regex pattern in the "Find" field. You can utilize flags like /i for case-insensitivity by unchecking "Case sensitive". Note: Whole word is automatically disabled in regex mode.
Currently the tool performs a global replace (all matches). If you need to replace just the first match, you can achieve that with a regular expression and a non-global flag, but in the current version all occurrences are replaced.
Absolutely. All processing happens locally in your browser. No data is ever sent to any server or stored anywhere.
Online Color Replacer – Pick & Swap Hue in Image
Select a color in an image and change it to another hue. Canvas‑based, local processing.
JavaScript Regex Cheatsheet - Online Interactive Pattern Reference
Interactive cheatsheet for JavaScript regular expressions with live examples. Click any token to see its explanation and test it on sample text immediately.
Video Audio Merger/Separator - Online Replace or Remove Soundtrack
Remove the original audio from a video and attach a new soundtrack. Or extract audio. All processed locally.
Regex State Machine Visualizer - Online DFA Diagram
Enter a simple regular expression and see its equivalent Deterministic Finite Automaton diagram. Learn how regex engines work.
Regex Injection / ReDoS Tester - Online Safe Pattern Test
Test a regular expression against malicious inputs to detect catastrophic backtracking and ReDoS vulnerabilities. Educational.
Regex Lookaround Tester - Online Experiment with Lookahead
Practice positive/negative lookahead and lookbehind. See matches highlighted live. Master advanced regex.
Unicode Property Regex Tester - Online \p{Script=Greek}
Test regular expressions with Unicode property escapes like \p{Emoji}. See matches live. Modern regex power.
Regex Catastrophic Backtracking Tester - Online Benchmark
Test a regex against long strings and measure execution time. Detect catastrophic backtracking patterns. Visual warning if slow.
Interactive Regex Cheatsheet - Online Quick Reference
An interactive reference for regular expression tokens. Click a token to see its explanation and example. Learn regex faster.
Regex to English Explainer - Online Understand Patterns
Paste a regular expression and get a step‑by‑step plain English explanation of what it does. Learn regex.
Regex Visualizer - Online Railroad Diagram Generator
Enter a regular expression and see a visual railroad diagram explaining the pattern. Learn and debug regex.
Extract URLs - Online Link & Domain Finder Tool
Pull out all URLs and links from text. Extract domains, paths, and protocols. Perfect for SEO scraping or analyzing text documents. Client-side execution.
Extract Email Addresses - Online Email Harvester Tool
Extract all email addresses from a text block using a regex pattern. Deduplicate and sort results. Handy for lead extraction. Data stays on your machine.
RegEx Tester - Online Regular Expression Builder & Matcher
Build and test regular expressions against sample text. Real-time match highlighting, capture groups display, and flavor options. All inside your browser.