Free Online Tools

A growing collection of 100% free AI, finance and productivity tools — no signup, no install, everything runs right in your browser.

AI Tools

LLM VRAM Calculator

Estimate VRAM/RAM to run local LLMs (7B–405B), GGUF/AWQ/FP16.

Token Cost Calculator

Count tokens and compare GPT / Claude / Gemini API pricing.

AI Image Size Calculator

Best resolution & aspect ratio for Midjourney, SD & SDXL.

AI Prompt Library

Ready-to-use prompt templates — copy & paste into any AI.

Productivity & Developer Tools

Pomodoro Focus Timer

Pomodoro timer with built-in white/pink/brown noise & rain.

JSON & Regex Dev Tools

Format/validate JSON and test regular expressions locally.

Developer Tools

Base64, URL encode, JWT decoder, UUID, timestamp, hash.

Password Generator

Generate strong, secure random passwords — nothing uploaded.

Word & Character Counter

Count words, characters, lines, paragraphs and reading time.

QR Code Generator

Turn any URL or text into a downloadable QR code, free.

Convert length, weight, temperature, speed and data size.

Image Compressor & Resizer

Compress & resize JPG/PNG/WebP in your browser — no upload.

Color picker, HEX-RGB, palette & CSS gradient generator.

Finance & Market Tools

Compound Interest Calculator

Project recurring-investment growth for ETFs & retirement.

Everyday Calculators

BMI, percentage, loan/mortgage, age & tip calculators.

Images to PDF & merge PDFs in your browser — no upload.

Macro Economy Dashboard

Daily-updated macroeconomic indicators dashboard.

Taiwan ETF Analysis

Deep-dive analysis of 0050/0056/00878 — daily updated.

Surge Stock DNA Screener

Quant screener for Taiwan stocks, backtested over 20 years.

Taiwan Stock Backtester

Validate trading strategies on real historical data.

Global Events 3D Globe

Track 60+ major world headlines daily on a 3D globe.