All Tools
ToolThump is a collection of free online utilities organized into four categories: security, text, image and data. Every tool runs entirely in your browser - the files you open, the passwords you generate and the text you paste are never uploaded to a server.
There is no account to create and nothing to install: open a tool, use it, close the tab. Browse the full list below or jump straight to a category.
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Password Generator
Generate strong, random passwords.
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Password Strength Checker
Check the strength of your passwords.
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Encoder / Decoder
Encode and decode data in various formats like Base64, URL, and more.
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Text Comparison
Compare two pieces of text and highlight differences.
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Text Case Converter
Convert text to uppercase, lowercase, or title case.
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Duplicate Words Finder
Find and highlight duplicate words in a text.
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Image Converter
Convert images between different formats (PNG, JPG, WEBP, etc.).
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Image Resizer
Resize images to custom dimensions or standard aspect ratios.
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Image Color Picker
Pick a color from an image to get its HEX, RGB, and HSL values.
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Background Remover
Remove the background from images.
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QR Code Generator
Generate QR codes for URLs, text, and more.
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Image Metadata Viewer
View metadata of an image file.
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File Comparison
Compare two files and highlight differences.
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Markdown Editor
Create and preview Markdown documents with a simple and intuitive editor.
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Video Subtitles Generator
Generate SRT subtitle files from any video format with automatic speech recognition.