Tools Online (tools-online.site) is a free collection of online tools with two sections:
- PDF Tools — 12 PDF converters and utilities: format conversion, merge, split, compress, encrypt, watermark, plus an AI deep-parse that reconstructs PDFs into Word / Markdown / HTML.
- FinFlow — 10 financial calculators: compound interest, mortgage payments, early payoff, SIP, CAGR, inflation, retirement, savings goals, percentages, and currency conversion.
Our core principle is local-first: every financial calculation and most PDF conversions run entirely inside your own browser — nothing is uploaded or stored. The one cloud-powered feature, AI deep-parse, only relays files to a parsing service as a transit channel; we keep no copies.
Each tool documents its formula and offers verifiable, downloadable breakdowns. Tools Online is funded by a small number of display ads. Feedback is always welcome.