FuYeAI
Free online tools for creators and small teams
130 English tools — calculators, converters, PDF and image utilities, AI helpers and developer tools. Free tools run instantly in your browser, no signup needed.
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Best Free Online Calculators
The most-used free online calculators in one place: percentage, age, BMI, date, discount, compound interest, mortgage and sleep cycle — with formulas.
8 tools
Best Free Online Text Tools
Free text tools in one place: title case, word and character counters, case converter, text diff, repetition checker, slug generator, Morse code and fancy text.
11 tools
Best Free Online Time & Date Tools
The most useful date and time tools in one place: days-between-dates, countdown and stopwatch, sleep cycle planner, exact age and more.
5 tools
Best Free Online PDF Tools
The PDF tools people search for most: merge, PDF to image/TXT/Excel/HTML, image and Office to PDF, and page adjusting — no software to install.
11 tools
Best Free Online Developer Tools
The dev utilities people search for most: JSON and SQL formatters, JWT decoder, Base64, hash, regex, UUID and password generators, cURL-to-code, Mermaid and more.
26 tools
Best Home Improvement Calculators
The renovation calculators people search for most: tiles, paint, wallpaper, flooring, curtains, lighting lumens, electricity cost and air fryer conversion.
8 tools
Best Free Online Finance Calculators
The money calculators people search for most: mortgage with taxes, loan amortization, tip splitting, compound interest, ROI, rent costs and discounts.
10 tools
Best Free Online Image Tools
The image tools people search for most: compressor, format converter, favicon generator, PNG to SVG, GIF splitter, video to GIF and color picker.
9 tools
Best Free Health Calculators
The health calculators people search for most: BMI, due date, pregnancy week, ovulation, exact age, sleep cycles, caffeine and food calories.
9 tools
About FuYeAI
FuYeAI is an independent toolbox project: a growing set of fast, no-install utilities for everyday creator and small-business work. Free tools run entirely in your browser; heavier AI features are available to members. The site is bilingual — Chinese at the root paths and English on-en pages.