Developer Tools
Explore free online developer tools in this category—formatters, converters, generators, and more. Open any card to use the tool in your browser.
23 tools available
- UUID Generator OnlineFree online UUID v4 generator to create random RFC 4122 identifiers for databases, APIs, and distributed apps.
- Regex Tester OnlineFree online regex tester for developers to match patterns against sample text before shipping code.
- SQL Formatter OnlineFree online SQL formatter that lays out queries with indentation for reviews and documentation.
- SQL Validator OnlineFree online SQL syntax checker that surfaces obvious mistakes before you execute against a database.
- GUID Generator OnlineFree online GUID generator that outputs UUID-compatible strings for .NET, SQL Server, and Windows apps.
- UUID Normalizer OnlineFree online UUID normalizer that removes braces and standardizes casing for consistent comparisons.
- cURL to Fetch Converter OnlineFree online developer tool that translates curl snippets into browser fetch() calls for API prototyping.
- cURL to HTTPie Converter OnlineFree online CLI helper that rewrites curl commands into readable HTTPie syntax for API testing.
- UUID Format Validator OnlineFree online UUID checker that verifies canonical 8-4-4-4-12 structure and common version bits.
- ULID Generator OnlineFree online ULID generator that creates time-sortable identifiers for logs, queues, and databases.
- NanoID Generator OnlineFree online NanoID generator that emits short, URL-safe random strings with adjustable length.
- Cron Expression Generator OnlineFree online cron helper that drafts schedule strings for cron, Quartz, and similar job runners.
- Semantic Version Parser OnlineFree online SemVer parser that extracts major, minor, patch, prerelease, and build metadata fields.
- Semantic Version Comparator OnlineFree online SemVer comparator that orders versions using official precedence rules for releases.
- Bulk UUID Generator OnlineFree online bulk UUID tool that outputs many v4-style IDs for fixtures, seeds, and load tests.
- JSON Schema Validator OnlineFree online JSON Schema tester that enforces types, required fields, and constraints on sample payloads.
- JSON to TypeScript Generator OnlineFree online codegen helper that drafts TypeScript interfaces from JSON samples for typed API clients.
- JSON to Go Struct Generator OnlineFree online Go struct generator that maps JSON keys to tagged fields for backend handlers and DTOs.
- JSON to Java Class Generator OnlineFree online Java POJO starter that infers fields from JSON for REST clients and server models.
- UUID v7 Generator OnlineFree online UUID v7 generator that issues time-ordered IDs suited to modern databases and tracing.
- UUID v5 Generator OnlineFree online deterministic UUID v5 generator that hashes a namespace plus name with SHA-1 rules.
- UUID v3 Generator OnlineFree online legacy UUID v3 generator for MD5-based deterministic IDs when interoperability demands it.
- UUID Version Detector OnlineFree online inspector that reads UUID version and variant nibbles to debug mixed identifier systems.