Developer Tools Guides
Guides and tools aimed at developers and backend engineers.
28 articles
HMAC vs Hash: When to Use Each for Authentication and Integrity
A developer deep dive on HMAC. Why a plain SHA-256 hash does not authenticate a message, how HMAC adds a key, length-extension attacks, real-world uses (webhook signing, JWT HS256, AWS SigV4, session cookies, OTP), and common mistakes.
Read GuideISO 8601 Date Format Explained: The Only Format You Should Use
A developer deep dive on ISO 8601. The date-time grammar, basic vs extended form, offsets and the Z designator, durations and intervals, week and ordinal dates, how it relates to RFC 3339, why YYYY-MM-DD sorts for free, and the parsing gotchas that still bite.
Read Guidegzip vs Brotli vs Deflate: Web Compression Algorithms Compared
A developer deep dive on web compression. The LZ77 + Huffman family behind gzip and Brotli, how Brotli improves on Deflate, real-world ratios and speed numbers, browser support, and Nginx/Cloudflare configuration.
Read GuideUTF-8 vs UTF-16 vs ASCII: Character Encoding Explained for Developers
A developer deep dive on character encoding. ASCII and code pages, Unicode code points, how UTF-8/UTF-16/UTF-32 turn code points into bytes, surrogate pairs, the BOM, why UTF-8 won the web, and the gotchas that cause mojibake.
Read GuideJSON Web Tokens (JWT) Explained: Structure, Signing, and Common Mistakes
A developer deep dive on JSON Web Tokens. The three parts of a JWT, how HS256/RS256/ES256 signing actually works, JWT vs session cookies, and six common JWT security mistakes to avoid.
Read GuideQR Code Error Correction Levels Explained (L, M, Q, H)
A deep guide to QR code error correction levels - L, M, Q, and H - and the Reed-Solomon algorithm behind them. When to use each level, data capacity trade-offs, and how to pick the right one.
Read GuideHow to Verify File Downloads: Why a Checksum Alone Is Not Enough
Why a SHA-256 checksum alone does not prove a download is genuine. The signed SHA256SUMS workflow, real supply-chain incidents, GPG verification, and how to verify Tor Browser or an Ubuntu ISO end to end.
Read GuideHow I Optimize Laravel Performance in Production
A senior engineer's guide to Laravel performance optimization in production. Real bottlenecks, eager loading, indexing strategy, Redis caching, queues, and a 5s to 280ms case study.
Read GuideWhat is Base64 Encoding? A Complete Developer Guide
A developer deep dive into Base64 encoding. How the algorithm works, why output is 33 percent larger, URL-safe Base64, JWT and HTTP Basic Auth, padding rules, and when not to use it.
Read GuideHow I Structure a Scalable Laravel Application (In Production)
A senior engineer's guide to scalable Laravel application structure in production. Folder layout, layer responsibilities, a real checkout-flow example, and the mistakes the structure prevents.
Read GuideJSON Schema Tutorial: How to Validate JSON Data in Production
A production developer guide to JSON Schema. Anatomy of a schema, allOf vs anyOf vs oneOf, format validation gotchas, Ajv and Python jsonschema examples, and pitfalls that bite real teams.
Read Guide5 Laravel Mistakes I Made (and How I Fixed Them)
Five Laravel mistakes from real production systems and the practical fixes for each: fat controllers, weak API design, missing caching, ORM N+1 queries, and scattered business logic.
Read GuideUTC, GMT, and Time Zones: A Developer Guide to Avoiding Bugs
A developer guide to UTC, GMT, and timezone handling. Covers UTC vs GMT, the IANA database, DST edge cases, framework gotchas in JavaScript, Python, and Java, and a checklist to stop shipping timezone bugs.
Read GuideMD5 vs SHA-256 vs SHA-512: Which Hash Algorithm Should You Use?
A developer decision guide for choosing between MD5, SHA-256, and SHA-512. Covers SHA family history, MD5 collision attacks, performance on modern hardware, length extension, HMAC, and a use-case decision matrix.
Read GuideUnderstanding Unix Timestamps: Epoch Time Explained for Developers
A developer deep dive into Unix timestamps. Covers the history of the epoch, time_t internals, leap seconds, the 2038 problem, BigInt precision, and best practices for storing time.
Read GuideJSON to YAML Converter - The Complete Guide for Developers
Convert JSON to YAML without losing key order or types. Covers output styles, code examples in Python, Node, Ruby, Go, and CLI workflows with yq.
Read Guidebcrypt Password Hashing Explained for Developers
A developer guide to bcrypt. How it works, why speed matters, the cost factor, code examples in Node, Python, Go, PHP, and common mistakes to avoid.
Read GuideBest Free Online Developer Tools You Need in 2026
Discover the best free online developer tools for 2026. Hash generators, timestamp converters, JSON editors, YAML converters, and more for your workflow.
Read GuideUnix Timestamp Converter Online - Convert Epoch Time to Date Instantly
Convert Unix timestamps to readable dates and back. Learn about epoch time, seconds vs milliseconds, the 2038 problem, and code examples.
Read GuideHash Generator Online - Generate MD5, SHA-256 and More Instantly
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes online. Learn about hash algorithms, file integrity verification, and security best practices.
Read GuideCreate ZIP Files Online Free - Compress Files Without Installing Software
Create ZIP files online without installing software. Learn about ZIP compression, file size reduction, and how ZIP compares to RAR and 7Z.
Read GuideYAML to JSON Converter Online - Convert Between YAML and JSON Easily
Convert YAML to JSON and JSON to YAML online. Learn the key differences, the Norway problem, and when to use each format.
Read GuideJSON Formatter Online: Format, Validate & Beautify JSON Easily
Format, validate and beautify JSON online for free. Instant JSON formatting with error detection, copy and download options. No signup required.
Read GuideJSON Diff Comparison Tool - Compare JSON Data Online Easily
Compare two JSON files online and instantly see the differences. Find added, removed, and modified fields with a free JSON diff tool.
Read GuideOnline JSON Editor Tool - Edit and Format JSON Data Easily
Edit, format, and validate JSON data online with a structured visual editor. Free browser-based JSON editor with syntax highlighting.
Read GuideJSON Tools Online - Format, Validate, and Edit JSON Data Easily
Format, validate, edit, compare, and convert JSON data online. Free browser-based JSON tools for developers with no installation required.
Read GuideImage to JSON Converter Online - Fast and Structured Data Conversion with StackConvert
Pull dimensions, EXIF data, camera settings, and other metadata out of any image file as clean, structured JSON.
Read GuideImage Base64 Encoder Decoder Online - Fast and Secure Image Conversion with StackConvert
What Base64 is, when it makes sense to embed images as text strings, and how to encode or decode them in the browser.
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