AI Cost Calculator
Estimate AI API costs from token counts, with editable rates.
Free Tools
Free Tools
Twenty free tools that run entirely in your browser — no sign-up, no downloads, nothing sent anywhere.
Prompt Builder
Build clean, structured prompts from goal, audience, tone and format.
Word Counter & Readability
Words, characters, reading time, and an approximate Flesch score.
JSON Formatter & Validator
Pretty-print, minify, and validate JSON with clear errors.
Password Generator
Strong random passwords with a strength meter and copy button.
Color Palette & Gradient
Harmony palettes from one color, plus copyable gradient CSS.
Meta Tag Generator
SEO and Open Graph meta tags from your title and description.
Text Toolkit
Case conversion, space cleanup, line sorting, duplicate removal.
Unit Converter
Length, weight, temperature, and data size — fixed factors only.
Markdown Preview
Safe Markdown preview — raw HTML is escaped, never run.
Focus Timer
A simple Pomodoro-style timer that runs locally in your browser.
Base64 Encoder & Decoder
Encode and decode Base64 with full Unicode support.
UUID Generator
Random version 4 UUIDs, one or many.
Regex Tester
Test patterns with live match highlighting, safely capped.
Color Contrast Checker
WCAG ratios with AA and AAA pass/fail verdicts.
Lorem Ipsum Generator
Placeholder paragraphs, sentences, and words for mockups.
CSV to JSON Converter
CSV to JSON and back, with quoted fields handled.
Text Diff
Line-by-line comparison showing added, removed, kept lines.
Stopwatch & Countdown
A stopwatch with laps, plus a countdown timer.
Random Picker
Random winners from a list, or a random number in a range.