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Browse the tool catalog | Page 151

Search and filter the online tool directory by task, format, and category, then open detailed pages with clear inputs, examples, and execution context. Page 151.

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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

Docs Pricing Terms of Service Privacy Policy Contact

Math & Numbers

Fibonacci Sequence Generator

Generate Fibonacci sequence with customizable start numbers, length, and output format. Includes golden ratio analysis and mathematical properties.

Utilities

File Encoding Converter

Convert file encoding with auto-detection support between UTF-8, GBK, ISO-8859-1 and other character encodings

Utilities

File Hash Verifier

Calculate MD5/SHA1/SHA256 hash values for files and verify against expected hashes

Health

20-20-20 Eye Care Reminder

Follow the 20-20-20 rule: every 20 minutes, look at something 20 feet away for 20 seconds to reduce eye strain

Math & Numbers

Force Unit Converter

Convert between different force units (newton, pound-force, kilogram-force, dyne, etc.)

Utilities

File Extension Finder

Find file extensions by searching file type name or description

Math & Numbers

Fourier Series Calculator

Calculate Fourier series coefficients for common waveforms

Data Processing

Feature Scaler

Scale and normalize features using various methods for machine learning preprocessing and data standardization

Security

Field-Level Data Decryptor

Decrypt specific fields in CSV data using various decryption methods to restore encrypted information

Security

Field-Level Data Encryptor

Encrypt specific fields in CSV data using various encryption methods to protect sensitive information

Text Processing

Flesch Reading Ease Score Calculator - 弗莱士易读性评分器

Calculate Flesch Reading Ease Score and provide detailed text readability analysis with grade level estimation

Text Processing

Extended Text Base Codecs (Base65536 + netstring)

Encode and decode with less-common text codecs: Base65536 (binary → dense Unicode) and netstring (self-delimiting framing). Base85 is intentionally not rebuilt (already covered).