Word Counter
Words, characters, sentences, reading time, and estimated tokens.
Using AI? Optimize your prompts first.
Better prompts = better output = fewer revisions.
Try the Prompt Optimizer — Free →You might also like
Text Case Converter
Convert text to 12 different cases: UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case, and more. Free.
JSON Formatter
Format, minify, and validate JSON data instantly. See stats for keys, depth, and size. 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.
AI Prompt Grader
Paste any prompt and get a score out of 100 with specific fixes for identity, constraints, specificity, structure, and examples. Free prompt scoring tool.
100% client-side where applicable — your files and inputs stay in your browser. Nothing is uploaded to HundredTabs servers for these tools.