Image Resize & Compress
Set max dimensions, quality, and output format. Runs in your browser.
Drop an image here or click to upload
Your file never leaves your browser
Using AI? Optimize your prompts first.
Better prompts = better output = fewer revisions.
Try the Prompt Optimizer — Free →You might also like
Image Format Converter
Convert images between PNG, JPG, and WEBP instantly. Free, no upload to server.
PDF to Markdown Converter
Convert PDF files to clean markdown. Save up to 95% on tokens when pasting into ChatGPT, Claude, or Gemini. Free, 100% client-side, no upload.
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.
100% client-side where applicable — your files and inputs stay in your browser. Nothing is uploaded to HundredTabs servers for these tools.