Client-Side Only
All processing happens in your browser. Your data never leaves your device.
No Sign-Ups
Use any tool instantly. No accounts, no API keys, no friction.
Lightning Fast
Built with WebAssembly for millisecond response times.
Popular
Tools developers use daily
Fast, focused utilities that handle the everyday tasks without the hassle.
ER Diagram Generator
Transform database schemas into beautiful, interactive Entity Relationship Diagrams.
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AI Prompt Generator
Craft perfect prompts for ChatGPT, Claude, and other LLMs with built-in templates.
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JSON to Code
Convert JSON into TypeScript interfaces, Go structs, Python classes, and more.
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All Tools
Complete collection of utilities
AI Prompt Generator
Ls Command Builder
Find Command Builder
Locate Command Builder
Tar Command Builder
Grep Command Builder
Cut Command Builder
Sort Command Builder
Awk Command Builder
Sed Command Builder
Nmap Command Builder
Curl Command Builder
SSH Command Builder
Ping Command Builder
SS Command Builder
PS Command Builder
Regex Tester
JSON to Code Generator
XML to Code Generator
YAML to Code Generator
JSON Formatter
JSON Diff
JSON Minifier
JSON Fix
JSON To XML
JSON To YAML
String To JSON
JSON Schema GUI Builder
JSON Validator
JSON To CSV
CSV To JSON
CSV To YAML
CSV To XML
SchemaCode ER Diagram Generator
XML Formatter
XML Validator
XML Minifier
XML To JSON
XML To YAML
XML To CSV
YAML Formatter
YAML To JSON
YAML To XML
YAML Validator
YAML To CSV
Base 64 Encoder
Base 64 Decoder
Base 64 Converter
Base 64 to Image
Timestamp Converter
Cron Helper
Age Calculator
JWT Encoder
JWT Decoder
UUID v1 Generator
UUID v3 Generator
UUID v4 Generator
UUID v5 Generator
UUID v7 Generator
GUID Generator
ULID Generator
Frequently Asked Questions
Is my data really private?
Absolutely. All processing happens in your browser using JavaScript and WebAssembly. We have no servers processing your data, and no analytics tracking your inputs.
Can I use these tools offline?
Yes! Install LangStop as a Progressive Web App (PWA) and all tools work without an internet connection.
Are there usage limits?
None. Unlike API-based tools, our client-side approach means you can process gigabytes of data limited only by your device's memory.
Ready to streamline your workflow?
Join thousands of developers who rely on LangStop for fast, secure data processing.