Which semantic version ranges are supported?
SemVer Comparator supports npm-compatible ranges such as caret, tilde and comparison expressions.
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Developer tool collection
Developer Utilities
Compare versions, inspect differences and use practical utilities for everyday development workflows.
Development
.gitignore Generator
Generate .gitignore files from language, framework, IDE and operating system templates.
Open toolDevelopment
SemVer Comparator
Compare, validate, sort and evaluate semantic versions and npm-compatible ranges.
Open toolDevelopment
Diff Checker
Compare two texts and inspect added, removed and unchanged lines.
Open toolUtilities
UUID Generator
Generate secure UUID values directly in your browser.
Open toolDevelopment
Regex Tester
Test regular expressions against sample text.
Open toolUtilities
Timestamp Converter
Convert Unix timestamps into readable dates.
Open toolUtilities
Byte Converter
Convert bytes between decimal and binary storage units.
Open toolDevelopment
Number Base Converter
Convert integers between binary, octal, decimal and hexadecimal.
Open toolDevelopment
Text Case Converter
Convert text between lowercase, uppercase, title case, camelCase, PascalCase, snake_case and other common formats.
Open toolDevelopment
Slug Generator
Generate clean, SEO-friendly URL slugs from text with customizable separators and normalization options.
Open toolDevelopment
Unicode Escape Encoder / Decoder
Encode text into Unicode escape sequences or decode escaped Unicode back into readable text.
Open toolDevelopment
NanoID Generator
Generate secure NanoIDs with configurable length, alphabet and quantity directly in your browser.
Open toolDevelopment
Robots.txt Generator
Create, import, validate, copy and download robots.txt files with a visual rule builder.
Open toolAbout this collection
This collection contains general-purpose developer utilities that do not belong to a single data format or platform. It includes version comparison, diff inspection, UUID generation and other tools used across application development.
What you can do
- Compare semantic versions and npm-compatible ranges.
- Sort semantic version lists.
- Compare text and code differences.
- Generate UUID values.
- Test regular expressions.
- Convert timestamps and storage sizes.
- Generate .gitignore files from reusable templates.
- Convert integers between common programming number bases.
- Convert text into common capitalization and programming identifier styles.
- Create URL-safe slugs with customizable formatting.
- Encode and decode Unicode escape sequences.
- Generate secure NanoIDs with custom alphabets.
- Build and validate robots.txt files for search engine crawlers.
Frequently asked questions
Do these utilities upload my data?
The tools in this collection are designed to process values locally inside your browser whenever possible.
Can I compare prerelease versions?
Yes. SemVer Comparator understands prerelease precedence such as alpha, beta and release candidate identifiers.