Markdown Viewer
Paste Markdown and view formatted HTML with MathJax support.
Euler Preview
Preview Project Euler forum posts with BBCode and TeX support.
Pastebin
Share text snippets with public or unlisted links.
Text Diff
Compare original and changed text with line-level git-style output.
Base64 Encoder/Decoder
Encode files to Base64 and decode Base64 strings back into downloadable files.
Image Editor
Paste or drag an image, zoom in, rotate it, crop it, and export PNG or JPG files.
URL Encode/Decode
Encode and decode URL components, then move output back to input for multi-level transforms.
Area Code Lookup
Look up North American area codes by code, phone number, city, or state.
Data Format Converter
Convert and validate JSON, YAML, TOML, and CSV with text and semantic diffs.
CSV Viewer & Editor
Paste CSV and edit it in an Excel-like grid, then export or copy for Sheets.
To-Do List
Manage tasks with priorities, due dates, and cloud sync.
Daily Goal Tracker
Track multiple goals with a calendar that highlights each day.
Date Calculator
Compute differences and manipulate dates (add/subtract days, months, years).
LLM Cost Calculator
Estimate costs based on token usage with customizable model pricing.
Actuary Calculator
Estimate mortality odds based on Social Security tables.
YouTube Transcript
Extract and download transcripts from YouTube videos.
TIFF Viewer
View multi-channel TIFF images with channel toggling and custom colors.