QuickTextLab User Guide

QuickTextLab is an all-in-one browser toolkit for text processing, format conversion, security helpers, and time calculations.

Privacy First

• Every tool runs locally in your browser.
• Input text, passwords, and tokens are not sent to external servers.
• You can handle internal or sensitive content without leaving your device.

Text Tools

Text Counter

• Calculates characters, characters without spaces, words, sentences, and paragraphs in real time.
• Handles multilingual Unicode text and emoji accurately.
• Includes estimated reading and speaking time.

Format Converter

• Converts text casing and naming styles: camelCase, snake_case, kebab-case, and more.
• Exports to JSON string, CSV row, Base64, URL encoding, and sanitized HTML.

JSON / YAML / TOML Converter

• Supports two-way conversion across the three common config formats.
• Includes JSON Pretty and Minify modes.

Regex Playground

• Tests JavaScript regex patterns with visible match groups.
• Previews replacement output before applying patterns elsewhere.

Markdown Converter

• Converts Markdown to sanitized HTML in real time.
• Supports GitHub Flavored Markdown features such as tables and checklists.

Line Tools

• Deduplicates, sorts, shuffles, and filters line-based lists.
• Useful for cleaning logs, keyword lists, and prompt blocks.

Diff & Similarity

• Compares text by line, word, or character.
• Calculates overall similarity as a percentage.

Security & Random

Random Generator

• Generates secure passwords, passphrases, UUID v4, Base64, and HEX values.
• Includes ambiguity-safe options for production use.

Security Tools

• Provides SHA-256/384/512 and MD5 hashing.
• Supports HMAC generation/verification, JWT decoding, and Bcrypt hash checks.

Invisible Characters Detector

• Highlights zero-width and whitespace characters such as ZWSP and BOM.
• Helps debug copy/paste and parsing issues in documents and code.

Time Tools

Time Converter

• Converts Unix (seconds/milliseconds), ISO-8601, and human-readable date strings.
• Shows multiple timezone results side by side.
• Detects JWT exp, iat, and nbf fields and converts them to readable times.

Practical Tips

1. Use Share to generate a URL containing the current input and options.
2. Drag and drop .txt, .csv, .md, or .json files into supported tools.
3. Use Ctrl/Cmd + Enter in supported converters for faster execution.

Languages and Theme

• Languages: Korean, English, Japanese, Chinese
• Theme: Light, Dark, and System Sync

Support

Use the Contact page to report bugs, request features, or suggest translation improvements.

Last updated: 2026-02-27