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Browse the tool catalog | Page 155

Search and filter the online tool directory by task, format, and category, then open detailed pages with clear inputs, examples, and execution context. Page 155.

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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 & Color284

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

Text & Writing200

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

Conversion & Encoding164

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

Developer & Web161

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

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Text Processing

Em-dash & Typographic Purifier

Convert AI-typical plain ASCII into proper typography: -- and --- become en/em dashes, straight quotes become curly/smart quotes (locale-aware), ... becomes a single ellipsis …, spaced dashes are tightened, and repeated spaces collapse — while fenced ``` code blocks and `inline` code are left untouched.

Design

Email Signature HTML Builder

Generate a clean, copy-paste HTML email signature that renders correctly in Gmail, Outlook, and Apple Mail — with avatar/logo, social icons (auto-detected from your links), accent color, light/dark/auto theme, and a table-based email-safe layout using inline styles. Copy the raw HTML and paste straight into your mail client.

Validation

EAN-8 Barcode Validator

Validate 8-digit EAN-8 / GTIN-8 product barcodes with check-digit verification, GS1 country prefix and packaging breakdown.

Science & Education

Electron Configuration Calculator

Look up electron configurations, shell distributions, valence electrons, and orbital diagrams by element symbol or atomic number

Math & Numbers

Degrees to Arcminutes

Convert degrees to arcminutes with configurable decimal precision

Security

Ed25519 / X25519 Keygen and Signature Verifier

Generate Ed25519 or X25519 keypairs from random or deterministic seed text, then sign or verify messages

Math & Numbers

Electronvolt to Joule

Convert electronvolts to joules with configurable precision

Media

DSD to PCM Converter

Convert DSD (Direct Stream Digital) audio files to PCM WAV format with selectable bit depth and sample rate

Media

DTS to AC3 Converter

Convert DTS audio to AC3 (Dolby Digital) format with bitrate and channel controls

Math & Numbers

Effect Size Calculator

Calculate Cohen d, Hedges g, Cohen h for proportions, or correlation r effect sizes from summary statistics

Math & Numbers

Dot Product Calculator

Compute the dot product, cosine similarity, and angle between two vectors

Math & Numbers

Exponential Calculator

Calculate natural exponential values e^x, inspect growth factors, and compare them with the inverse e^-x