Does text leave my browser?
The text transformations in this collection run locally. Do not paste private text into untrusted devices or browser extensions.
Text productivity
Text Tools
Clean and inspect text locally: URL slugs, whole-word replacement, case conversion, duplicate-line removal and word counts. Choose a focused workflow.
Choose a text taskSlugs, replacement, case, counts and cleanup
Exact tool pages
Open the tool you need
Each link lands on a dedicated page with the exact FormatNest workspace ready to use.
Text to Slug: Unicode URL Slug Generator
Create lowercase URL slugs from titles. Choose hyphens or underscores and optionally retain non-Latin letters.
Find and Replace Text: Whole Words and Regex
Replace literal text or regular-expression matches locally. Choose case-sensitive or whole-word matching and see the replacement count.
Case Converter Online
Change the letter case of text without uploading a document.
Word Counter Online
Count words and related text statistics from the supplied content.
Character Counter Online
Count text characters for a message, form or publishing limit.
Remove Duplicate Lines
Remove repeated lines from text while retaining the remaining lines.
Number to Words: English Integers and Decimals
Write signed numbers in English without dropping decimal digits. Choose US, UK, Canadian or Australian wording.
Regex Tester: JavaScript Matches With Time Limits
Test JavaScript regular expressions locally and inspect match text and positions without running patterns on the main UI thread.
Common text workflows
Prepare a page title
Check word and character counts, then generate a URL slug. Check the destination CMS before changing an existing URL.
Clean a list
Use find and replace to normalize separators, then remove duplicate lines. Review the output before replacing an original file.
Check a pattern
Test a pattern in the JavaScript regex tester before applying regex replacement. Slow patterns stop instead of freezing the tool interface.
FAQ
Developer Tools Online FAQ
Can these tools replace a document editor?
No. They transform plain text, not complex document formatting. Keep a copy of the original.