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Browse the tool catalog | Page 9

Search and filter the online tool directory by task, format, and category, then open detailed pages with clear inputs, examples, and execution context. Page 9.

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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

Development

JSON to TypeScript Converter

Convert JSON data into TypeScript interfaces or type aliases with union types, optional fields, and nested object inference

Security

JWK Generator & Parser

Generate JSON Web Keys (JWK) for RSA, EC (P-256/P-384/P-521/secp256k1), and OKP (Ed25519/Ed448/X25519/X448), or parse an existing JWK to inspect its parameters, thumbprint, and metadata

Development

Hex Editor (File Viewer)

Upload any binary file and inspect it as a classic hex dump with offset, hex bytes, and ASCII columns (read-only)

Format Conversion

Hex to String Converter

Convert text to and from hexadecimal strings with flexible spacing, prefix (0x/\x/U+), and case options

Health

Sleep Debt Calculator

Calculate cumulative sleep debt across the last 7 to 14 nights and generate a gradual recovery plan

Format Conversion

Text to Binary Converter

Convert text to and from binary bit strings using ASCII (7-bit) or UTF-8 (8-bit) encoding

Format Conversion

XML Escape / Unescape

Escape and unescape XML special characters (& < > " ') with optional numeric references, slash escaping, and CDATA wrapping

Development

HTTP Status Code Reference

Complete HTTP status code reference (1xx–5xx) with semantics, typical scenarios, and retry advice in a filterable comparison table

Security

JWT Inspector & Verifier

Decode a JWT (header + payload) with syntax highlighting, diagnose standard claims, and verify the signature with HS*/RS*/PS*/ES*/EdDSA keys — plus a tampered-token forgery demo

Astronomy

Kepler Orbit Solver

Numerically solve Kepler’s equation E − e·sin(E) = M for eccentric anomaly E, true anomaly ν, orbital radius and relative speed, with Newton/bisection/fixed-point methods, convergence history and an SVG orbit diagram

Development

SERP & Social Preview Studio

Preview Google SERP (pixel-accurate desktop & mobile truncation), X (Twitter) Card, and OpenGraph card side by side, with pre-launch SEO diagnostics

Development

SQL Explain Plan Visualizer

Parse EXPLAIN / EXPLAIN ANALYZE output (PostgreSQL/MySQL/SQLite) into a cost tree, flag estimated-vs-actual row divergence, and suggest indexes