Developer topic guide
Security tools
Hash, checksum, and regex utilities for developers — free browser-based security helpers.
Topic guides
Browse focused guides that compare related tools and link to the best starting point for your task.
- JSON toolsFormat, validate, compare, and convert JSON with free developer utilities in your browser.
- JWT toolsDecode, encode, and generate JSON Web Tokens in your browser with Utilnivo JWT tools.
- Encoding toolsBase64, URL, and HTML encoding utilities for developers — free and browser-based.
- FormattersFormat and minify HTML, CSS, JavaScript, SQL, XML, YAML, and Markdown in your browser.
- Network toolsDNS, WHOIS, SSL, HTTP headers, and cURL helpers for quick network debugging in your browser.
- Security toolsHash, checksum, and regex utilities for developers — free browser-based security helpers.
- UUID toolsGenerate and decode UUIDs with free developer tools in your browser.
Tools in this guide
Overview
Security tools generate digests and test patterns without installing CLI utilities. Hash Generator supports common algorithms for integrity checks. File Checksum validates downloads. Regex Tester experiments with JavaScript-flavored patterns.
Hashes verify integrity, not authenticity — pair with signed releases from trusted sources. Regex Tester uses JS semantics; PCRE differences may matter in other runtimes.
Do not hash passwords for storage without proper salt and dedicated password hashing algorithms in your application code.
How to choose
- String digest → Hash Generator.
- File integrity → File Checksum.
- Pattern experiments → Regex Tester.
Frequently asked questions
Which hash for file integrity?
SHA-256 is a common choice. Match the algorithm your download page documents.
Are files uploaded for checksum?
File Checksum reads locally in the browser.
Does regex match server languages?
Patterns use JavaScript RegExp rules unless noted otherwise.
Related workflows
These multi-step guides chain tools from this category for common jobs.