Text Diff Checker
Compare two texts side by side. See additions, removals, and changes highlighted.
Also try: Word Counter · Remove Duplicates
Using AI? Optimize your prompts first.
Better prompts = better output = fewer revisions.
Try the Prompt Optimizer — Free →You might also like
Word Counter
Count words, characters, sentences, paragraphs, reading time, speaking time, and estimated AI tokens. Free, instant, no signup.
Remove Duplicate Lines
Remove duplicate lines from text while preserving order. See how many duplicates were found. Free.
Text Line Sorter
Sort text lines alphabetically, reverse, by length, or randomly. Remove duplicates while sorting. Free.
AI Prompt Optimizer
Paste any AI prompt and get an optimized version using the ICCSSE framework. Works for ChatGPT, Claude, and Gemini. Free, no signup, runs in your browser.
100% client-side where applicable — your files and inputs stay in your browser. Nothing is uploaded to HundredTabs servers for these tools.