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Browse the tool catalog | Page 6

Search and filter the online tool directory by task, format, and category, then open detailed pages with clear inputs, examples, and execution context. Page 6.

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Math, Date & Finance586

Calculators, numerics, date logic, statistics, and finance tools

Images, Audio & Video564

Image, audio, and video processing, conversion, and optimization tools

Design & Color282

Color, layout, graphics, visual styling, and design helper tools

Text & Writing199

Writing, cleanup, formatting, extraction, and text analysis tools

Conversion & Encoding164

Format, file, archive, unit, and encoding conversion tools

Developer & Web158

Developer utilities, networking, web debugging, and automation helpers

Audio Encoding and Format Conversion Tools

Image Format Conversion and Animated Export Tools

JSON Interchange and Format Translation Tools

Color Space Conversion Tools for Web and Print

Text Case, Encoding, and Normalization Conversion Tools

Docs Pricing Terms of Service Privacy Policy Contact

Health

Sleep Calculator (90-Minute Cycles)

Find the best bedtime or wake time based on the brains 90-minute sleep-cycle rhythm. Enter a target wake time and get recommended bedtimes, or enter a bedtime to project forward.

Games

Hangman Game

Classic hangman word-guessing game. Guess the hidden word letter by letter; six wrong guesses ends the game. Three difficulty levels, with general, animals, food, and science categories.

Math & Numbers

Half-Life Calculator

Exponential decay for radioactive isotopes and drugs: remaining amount, derived half-life, time to target, or steady-state accumulation. Uses N(t) = N0·e^(-λt).

Math & Numbers

Significant Figures Sandbox

Practice significant-figure rules with step-by-step feedback: count sig figs, round to N sig figs, convert to scientific notation, and propagate through +/−/×/÷.

Design

Social Media Image Size Cheatsheet

A curated 2026 reference of image dimensions for Instagram, Facebook, X, LinkedIn, YouTube, TikTok, Pinterest and WeChat — filterable by platform.

Media

Image to Spectrogram Audio

Convert a bitmap image into reconstruction-first audio designed to reappear in a spectrogram, then export the audio and a verification spectrogram preview together.

Data Visualization

Histogram Maker

Bin numeric data into intervals and draw a histogram to visualize a statistical distribution

Development

HTML Minifier

Compress HTML by removing comments, collapsing whitespace and minifying inline CSS/JS

Format Conversion

JSON Minifier

Compress JSON data by removing all unnecessary whitespace

Network

HTTP/3 QUIC Handshake Anatomy

Dissect the HTTP/3 over QUIC handshake byte-by-byte. Visualise the 1-RTT fresh handshake, session-ticket resumption, and 0-RTT early-data scenarios, with sequence diagrams, per-packet field layouts, the Retry packet, and a side-by-side comparison against TCP + TLS 1.3. Built for interview prep, protocol learning, and performance engineering.

Math & Numbers

Gas Law Calculator

Solve pressure, volume, temperature, or moles with the Ideal Gas Law (PV=nRT) or Combined Gas Law; also gas density and molar mass.

Text Processing

Sentence Case Converter

Convert text to Sentence case: capitalize the first letter of each sentence and lowercase everything else. Auto-restores the standalone pronoun "I".