Toova Blog
Hướng dẫn, bài viết và mẹo về JSON, JWT, regex, băm và các công cụ lập trình khác.
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Best Free JSON Formatters 2026 — Review & Comparison
Compare the top 10 free JSON formatters of 2026. Privacy, features, performance reviewed. Find the best one for your workflow — no signup needed.
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What is JWT and How to Decode It Safely (2026 Guide)
Complete guide to JSON Web Tokens (JWT). What is inside, how to decode safely without leaking secrets, and best practices for 2026.
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Understanding Base64 Encoding — Complete Guide for Developers
Complete Base64 encoding guide. How it works, when to use, padding, URL-safe variant, performance trade-offs, and practical examples.
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Best UUID Generators 2026 — v4, v7, NIL Reviewed
The best UUID generators of 2026 reviewed for v1, v4, v7, and NIL UUIDs. Privacy, bulk generation, format options compared.
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UUID v4 vs v7 — Differences, Performance, When to Use
UUID v4 vs v7 compared. Time-ordered v7 fixes v4 database index fragmentation. Migration guide and when to use each.
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Hash Functions Explained — MD5 vs SHA-256 vs SHA-512 (2026)
MD5, SHA-256, and SHA-512 hash functions compared. Performance, security, when to use, and when to avoid. With real-world examples.
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MD5 vs SHA-256 — Why You Should Stop Using MD5 (2026)
MD5 vs SHA-256 compared. MD5 is broken: collision attacks, Flame malware case. When MD5 is OK (rarely) and when SHA-256 is mandatory.
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Best Regex Testing Tools 2026 — Compare Top Online Testers
Compare the top regex testers of 2026 for JavaScript, Python, PHP, and more. Find tools with live highlighting, group capture, and flag support.
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Regex101 vs Online Regex Testers — Honest Comparison 2026
Regex101 is the gold standard, but there are alternatives. Compare features, privacy, multi-flavor support, and choose the right tester for your workflow.
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10 Regex Tricks Every Developer Should Know (2026)
10 practical regex tricks that save hours: lookaheads, named groups, non-greedy quantifiers, conditional patterns. Real code examples included.
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Cron Expression Syntax Explained — 2026 Developer Guide
Cron expression syntax explained with real examples. 5-field vs 6-field, ranges, lists, step values, special characters, and common pitfalls.
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5 Cron Expression Patterns Used in Real Production (2026)
5 real-world cron patterns used by production teams. From simple daily jobs to staggered batches that avoid thundering herds.
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JSON vs YAML — When to Use Each (2026 Developer Guide)
JSON vs YAML compared. Syntax, readability, comments, performance, real-world use cases (Kubernetes, GitHub Actions). When to pick each.
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7 JSON Tricks That Will Save You Hours (2026)
7 practical JSON tricks: deep clone, custom replacer, sort keys, BigInt handling, circular refs, pretty print, streaming. Save hours of debugging.
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How to Format JSON in JavaScript (5 Methods Explained)
Format and pretty-print JSON in JavaScript with 5 different methods. Native, with custom indent, sorted keys, and edge cases — full code examples.
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Best Online Code Beautifiers 2026 — CSS, JS, HTML, SQL
Compare top online code beautifiers and formatters for 2026. CSS, JavaScript, HTML, SQL — review of privacy, features, and minification support.
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Best JWT Decoders for Developers 2026 — Privacy-First Review
The best JWT decoders of 2026 reviewed for security, privacy, and features. Compare token decoding tools that respect your data — none uploaded to servers.
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Best Free Color Picker Tools 2026 — HEX, RGB, HSL, OKLCH
The best free color picker tools of 2026 reviewed. Support for HEX, RGB, HSL, OKLCH, palette extraction, and CSS-ready output.