NurseryToolSecurity · 12 free browser-based tools
Free Online Security Tools
A practical collection of browser-first security helpers for inspecting text and generating common values. Each tool explains when data stays in your browser and when a lookup contacts an external service.
Browse Security tools
Generate a password, inspect a JWT payload, encode a URL component, or check publicly available network information.
- Password GeneratorStrong random passwords with custom length & char rules
- Hash GeneratorGenerate SHA-1, SHA-256, or SHA-512 hashes in-browser
- Base64 Encoder/DecoderEncode or decode Base64 strings instantly
- JWT DecoderDecode & inspect JSON Web Token headers and payloads
- URL Encoder/DecoderEncode or decode URL-safe percent strings
- UUID GeneratorGenerate v4 UUIDs for unique identifiers in bulk
- Password StrengthAnalyze how secure your password really is
- SSL CheckerLearn what browser-only SSL checks can safely verify
- IP LookupView this device's public IP and estimated network location
- Fake Data GeneratorGenerate realistic test data for development & QA
- WHOIS LookupDomain registration and ownership information
- CSR GeneratorGenerate certificate signing request fields
This category currently has no published tools.
Using NurseryTool
Open the tool you need, review its instructions and any data-sharing note, then check the result before using or sharing it. Many image, PDF, text, and developer operations run in your browser; external lookups are identified on the relevant tool page.