35 Free Tools · No Login Required

Engineering Made Easy

Simplify your workflow with powerful conversion, encoding, and calculation tools — all in one place, free and instant.
Popular Tools
CRC Calculator
Calculate CRC checksums with 100+ algorithms for data integrity verification
Drone Motor/Battery Calculator
Calculate drone thrust, TWR, hover throttle, flight time, and battery C-rating safety. Compare up to 4 motor/battery/propeller configurations side by side.
Time Calculator
Add or subtract hours, days, and more from any date; copy Unix epoch seconds (timestamp). Time difference between two datetimes, work hours with break deduction. 400+ timezones, DST-aware.
3D Rotation Converter
Convert between Quaternions, Euler Angles, and 3×3 Rotation Matrices bidirectionally with interactive 3D visualization
Bezier Curve Editor
Interactive cubic Bezier curve editor with real-time animation preview, 35 easing presets, side-by-side comparison, and code export for CSS, Unity C#, C++, and JavaScript.
Base32 Encoder/Decoder
Encode and decode Base32 data for TOTP, 2FA secrets, and human-readable encoding
Categories
All Tools (35)
3D Rotation Converter
Convert between Quaternions, Euler Angles, and 3×3 Rotation Matrices bidirectionally with interactive 3D visualization
3D Rotation Visualizer
Visualize 3D rotations using Quaternions, Euler Angles, and Rotation Matrices with interactive 3D visualization
ASCII Converter
Convert text to ASCII codes and vice versa with multiple formats
Base32 Encoder/Decoder
Encode and decode Base32 data for TOTP, 2FA secrets, and human-readable encoding
Base64 Encoder/Decoder
Encode and decode Base64 data with support for files and URLs
Bezier Curve Editor
Interactive cubic Bezier curve editor with real-time animation preview, 35 easing presets, side-by-side comparison, and code export for CSS, Unity C#, C++, and JavaScript.
Color Converter & Palette Generator
Free online color converter: HEX, RGB, HSL, HSV, HWB, CMYK, and NCol with bidirectional editing. Generate complementary, analogous, triadic, tetradic, and Tailwind-style palettes. WCAG 2.1 contrast vs white/black, color history, one-click copy. Runs in your browser.
CRC Calculator
Calculate CRC checksums with 100+ algorithms for data integrity verification
Cron Expression Parser
Parse Linux (5-field) and Quartz/Spring (6–7 field) cron expressions: human-readable schedule, next N execution times in any IANA timezone, expression builder, presets, and quick reference. Runs locally in your browser.
Drone Motor/Battery Calculator
Calculate drone thrust, TWR, hover throttle, flight time, and battery C-rating safety. Compare up to 4 motor/battery/propeller configurations side by side.
Elapsed Time Calculator
Calculate duration between two dates in seconds, minutes, hours, days, months, and years
Endian Converter
Free online endian converter and byte swap calculator. Convert big endian to little endian with memory layout visualization, C bswap code generator, IEEE 754 float byte order, and htonl/ntohl reference for embedded and network developers
File Hash Calculator
Calculate MD5, SHA-1, SHA-256, SHA-512 hashes for files and text
Format Converter
Convert between YAML, JSON, and TOML formats for configuration files and data exchange
HTML Entity Converter
Encode and decode HTML entities for safe web content display
HTTP Request Code Generator
Build HTTP requests and generate code snippets for cURL, JavaScript, Python, Java, Go, and Rust with headers, auth, and body support
JSON Formatter & Converter
Format, validate, minify and beautify JSON data with error detection
JWT Encoder & Decoder
Decode JWT header and payload, verify HS256/HS384/HS512 signatures with your secret, inspect exp/iat/nbf/iss/sub/aud, and encode new JWTs from JSON—all in the browser. No upload; ideal for API auth debugging and learning RFC 7519.
Markdown Previewer
Live Markdown editor with GFM support, tables, task lists, footnotes, TOC, and HTML export
Number Base Converter
Convert numbers between binary, decimal, hexadecimal, and octal with precision
Password Generator
Generate secure passwords, API keys, and tokens with customizable strength
QR Code Generator
Free QR code generator in your browser: plain text, URL, WiFi (WPA/WPA2/WEP), vCard contacts, mailto, tel, and SMS. Adjust Reed–Solomon error correction (L–H), foreground/background colors, module size, quiet zone, and download vector SVG or PNG. Runs locally in WebAssembly—nothing is uploaded.
Regular Expression Tester
Test and debug regex patterns with live matching, group capture, and replacement
Robot Arm FK/IK Calculator
Robot arm kinematics for learning & practice: FK/IK, DH tables, Jacobian—aligned with cobots, industrial robots, humanoid arms, and AI robotics workflows. Robot programming friendly (CSV export). 2–6 DOF, SCARA, UR/KUKA-style presets, 3D visualization. Runs in your browser.
Text Case Converter
Convert between camelCase, PascalCase, snake_case, kebab-case, and more
Text Diff Comparator
Compare two texts line by line with side-by-side, inline, and unified diff views
Time Calculator
Add or subtract hours, days, and more from any date; copy Unix epoch seconds (timestamp). Time difference between two datetimes, work hours with break deduction. 400+ timezones, DST-aware.
Timestamp Log Sorter
Parse, sort, and convert timestamps in log files with auto-detection for ISO-8601, Unix, and RFC 2822 formats
TLS Certificate Analyzer
Parse and analyze X.509 TLS/SSL certificates with chain visualization, expiration tracking, cipher suite info, and security vulnerability detection
TOTP Generator
Generate RFC 6238 TOTP codes from a Base32 secret: SHA-1/SHA-256/SHA-512, 15/30/60s steps, 6 or 8 digits. otpauth:// QR for authenticator apps, verify with time drift tolerance, optional HMAC debug. Client-side only.
Unit Converter
Convert between length, weight, temperature, pressure, speed, area, volume, data size, time, and energy units
Unix Timestamp Converter
Convert Unix epoch seconds to readable dates and back. ISO 8601 & RFC formats, millisecond-aware input, 400+ IANA timezones, DST-aware. Runs locally in your browser.
URL Encoder/Decoder
Encode and decode URLs for proper web transmission and parsing
UUID Generator
Generate RFC-compliant UUIDs (v4) for unique identification in applications
XML Formatter & Viewer
Format, validate, and visualize XML documents with tree view, syntax highlighting, and error detection