DevToolbox Blog
Practical guides and tutorials to help you work faster with developer tools. All tools run in your browser — your data never leaves your device.
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Base64 Encoding & Decoding: The Complete Guide for Developers
Learn how Base64 encoding works, when to use it, and how to encode and decode data online — instantly and privately in your browser.
Base64 Encoder/DecoderHash GeneratorJWT Decoder
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JSON Formatter & Validator: How to Pretty-Print and Fix JSON
Format, validate, and debug JSON data online. Learn JSON syntax rules, common errors, and how to pretty-print JSON — all in your browser.
JSON FormatterSQL FormatterYAML Converter
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JWT Tokens Explained: How to Decode, Verify, and Debug JWTs
Understand JSON Web Tokens from the ground up. Learn the JWT structure, decode tokens, and debug authentication issues — privately in your browser.
JWT DecoderBase64 Encoder/DecoderJSON Formatter
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Regular Expressions Guide: How to Write and Test Regex Patterns
Master regular expressions with practical examples. Learn regex syntax, test patterns in real-time, and build complex matches — all in your browser.
Regex TesterRegex Cheat SheetCode Playground
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Cron Expression Builder: How to Schedule Tasks with Cron Syntax
Learn cron expression syntax step by step. Build, test, and validate cron schedules for Linux, Kubernetes, and CI/CD — instantly in your browser.
Cron BuilderCron Cheat SheetEpoch Converter
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UUID Generator: How to Create and Use UUIDs in Your Projects
Generate UUIDs (v1, v4, v7) online. Learn the differences between UUID versions, when to use each, and best practices — all in your browser.
UUID GeneratorHash GeneratorPassword Generator
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Hash Generator Guide: SHA-256, MD5, and More — When to Use Each
Generate SHA-256, MD5, SHA-1, and SHA-512 hashes online. Learn how hashing works, which algorithm to pick, and common use cases — privately in your browser.
Hash GeneratorHMAC GeneratorBcrypt Hasher
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Git Cheat Sheet: Essential Commands Every Developer Should Know
The ultimate Git cheat sheet with practical examples. Learn branching, merging, rebasing, stashing, and more — with an interactive searchable reference.
Git Cheat SheetDiff ViewerChangelog Generator
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Docker Cheat Sheet: Commands, Dockerfile Tips, and Best Practices
Master Docker with this comprehensive cheat sheet. Learn container management, image building, networking, and Docker Compose — with a searchable reference.
Docker Cheat SheetYAML/JSON ConverterKubernetes Guide
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SQL Formatter & Beautifier: How to Write Clean, Readable SQL
Format and beautify SQL queries online. Learn SQL formatting best practices, naming conventions, and how to write maintainable queries — all in your browser.
SQL FormatterSQL Cheat SheetJSON Formatter