Free Online Tools
Fast, private, no signup. All processing happens in your browser.
Prompt Generator
Visual prompt workflow builder — create action blocks, connect them on canvas, generate step-by-step instructions
Midi
Browser-based MIDI editor with piano roll, multi-track playback, instrument selection, and .mid import/export
Base64
Encode and decode Base64 — text, files, URLs. Fast, private, browser-based
Json
Format, validate, and explore JSON with syntax highlighting, tree view, and JSONPath
Json Formatter
Format, validate, and explore JSON with syntax highlighting, tree view, and JSONPath
Json Path
Format, validate, and explore JSON with syntax highlighting, tree view, and JSONPath
Json Validator
Format, validate, and explore JSON with syntax highlighting, tree view, and JSONPath
Markdown
Write and preview Markdown with live split-view, toolbar, syntax highlighting, and export
Mermaid
Create and edit Mermaid diagrams with live preview, validation, theme switching, and SVG/PNG export
Regexp
Build, test, and debug regular expressions with live matching, syntax highlighting, and match details
Token Counter
Count LLM tokens for GPT-4o, Claude, Gemini, Llama with cost estimation
Url Decoder
Encode and decode URL components — encodeURIComponent, encodeURI, and back
Url Encoder
Encode and decode URL components — encodeURIComponent, encodeURI, and back
Powerpoint
View and edit PowerPoint (PPTX) presentations in your browser. Drag & drop, fullscreen viewer, text editing, export
Writer
Plan and write books in your browser — markdown editor with live preview, chapter structure, scene blocks, event map, AI assist. Works offline
Password Generator
Generate strong, cryptographically secure passwords with customizable rules
Word Counter
Count words, characters, sentences, paragraphs and reading time
What is UseTool?
UseTool is a collection of free browser-based utilities designed for everyday tasks. Every tool runs entirely in your browser — your files and data never leave your device. There are no accounts to create, no subscriptions to manage, and no ads to dismiss.
We build tools that load fast and work on any device. Whether you need to count words in an essay, convert an image format, generate a secure password, or analyze JSON data, UseTool provides a clean, focused interface for each task. Each tool is available on its own subdomain, so you can bookmark exactly what you need.
Privacy is not a feature we bolt on — it is the architecture. Because every tool is a static site with no backend server, it is technically impossible for us to access your data. There are no cookies, no tracking scripts, and no third-party analytics. Your work stays on your machine.
UseTool is free and always will be. We believe simple utilities should be accessible to everyone without barriers. The platform grows over time as we add new tools across categories like text processing, image editing, developer utilities, calculators, and more. Every tool is open to use without limits — no daily quotas, no watermarks, no feature gates.