Every tool, grouped category-wise — PDF, image, SEO, developer, accounts, sales, ads, teacher and file tools. Jump to a category below or search across all of them at once.
This page lists every free online tool available on Crazy Tools — currently 233+ tools spread across nine categories. Use the search box above to jump straight to a tool by name (for example "GST calculator", "merge PDF", or "JSON formatter"), or use the category tabs to browse tools grouped by type. Every tool opens instantly, requires no signup, and is completely free to use.
Merge, split, compress, convert and edit PDFs, plus convert between CSV, Excel, XML and JSON files.
Compress, crop, resize and convert images, and format, validate or beautify JSON, CSS, HTML and JavaScript.
GST, EMI, ROI and payroll calculators for Accounts and Sales, plus grading and worksheet generators for Teachers.
Common questions about browsing and using the tools directory.
Crazy Tools currently offers 233+ free online tools across 9 categories: PDF, Image, SEO, Developer, Accounts, Sales, Ads & Marketing, Teacher, and File tools.
Yes — use the category tabs above the tool grid to instantly filter the list, or combine a tab with the search box to narrow results further.
No. Every tool runs directly in your web browser — nothing to install, and most process your files locally without uploading them anywhere.
We add new tools regularly. Check the "Latest additions" section on the homepage to see what's newest.
Please let us know through the Contact page with the tool name and a description of the issue, and we'll look into it.