https://uuidstudio.com/blog/ Tutorials on UUIDs, MongoDB, JSON, JWT, encoding, crypto, and API debugging. en-us https://uuidstudio.com/blog/how-to-url-encode-query-strings/ https://uuidstudio.com/blog/how-to-url-encode-query-strings/ Fri, 31 Jul 2026 12:00:00 GMT Why unencoded spaces, ampersands, and slashes break URLs, what encodeURIComponent actually does, and when percent-encoding differs from Base64. https://uuidstudio.com/blog/how-to-sort-json-keys/ https://uuidstudio.com/blog/how-to-sort-json-keys/ Wed, 29 Jul 2026 12:00:00 GMT Recursive key sorting, canonical JSON for hashing, and pitfalls when array order still matters. https://uuidstudio.com/blog/json-schema-validation-guide/ https://uuidstudio.com/blog/json-schema-validation-guide/ Tue, 28 Jul 2026 12:00:00 GMT Draft versions, keywords, compositional schemas, and validation workflows for reliable JSON APIs and config files. https://uuidstudio.com/blog/how-to-debug-json-apis/ https://uuidstudio.com/blog/how-to-debug-json-apis/ Sun, 26 Jul 2026 12:00:00 GMT Find syntax errors, schema drift, and encoding issues in JSON APIs using validators, formatters, and a step-by-step debugging workflow. https://uuidstudio.com/blog/aes-gcm-vs-aes-cbc/ https://uuidstudio.com/blog/aes-gcm-vs-aes-cbc/ Fri, 24 Jul 2026 12:00:00 GMT Compare AES-GCM and AES-CBC: authentication, IVs, padding, TLS usage, and when to pick each mode for application encryption. https://uuidstudio.com/blog/large-json-file-debugging/ https://uuidstudio.com/blog/large-json-file-debugging/ Wed, 22 Jul 2026 12:00:00 GMT Profile, stream, and slice huge JSON logs and exports without loading multi-gigabyte files into memory. https://uuidstudio.com/blog/common-jwt-security-mistakes/ https://uuidstudio.com/blog/common-jwt-security-mistakes/ Tue, 21 Jul 2026 12:00:00 GMT Avoid alg none, weak secrets, missing exp validation, trusting the payload without verify, and storing JWTs in localStorage. Practical fixes for each. https://uuidstudio.com/blog/bcrypt-vs-argon2/ https://uuidstudio.com/blog/bcrypt-vs-argon2/ Sun, 19 Jul 2026 12:00:00 GMT Compare bcrypt and Argon2id: memory hardness, parameters, PHC winner, and practical guidance for new applications in 2026. https://uuidstudio.com/blog/java-uuid-mongodb-conversion/ https://uuidstudio.com/blog/java-uuid-mongodb-conversion/ Fri, 17 Jul 2026 12:00:00 GMT Map java.util.UUID to MongoDB BSON Binary, configure legacy vs standard representation, and avoid endianness bugs in Spring Data. https://uuidstudio.com/blog/how-jwt-expiration-works/ https://uuidstudio.com/blog/how-jwt-expiration-works/ Wed, 15 Jul 2026 12:00:00 GMT Understand JWT exp and nbf claims, leeway settings, refresh tokens, and clock skew between servers, containers, and laptops. https://uuidstudio.com/blog/how-password-hashing-works/ https://uuidstudio.com/blog/how-password-hashing-works/ Tue, 14 Jul 2026 12:00:00 GMT Salts, work factors, bcrypt and memory-hard algorithms: how secure password storage works and what to never do in production. https://uuidstudio.com/blog/fixing-uuid-endianness-mongodb/ https://uuidstudio.com/blog/fixing-uuid-endianness-mongodb/ Sun, 12 Jul 2026 12:00:00 GMT Diagnose swapped UUID time fields in MongoDB, permute the first 12 bytes between subtype 03 and 04, and run a safe migration with rollback. https://uuidstudio.com/blog/jwt-vs-session-authentication/ https://uuidstudio.com/blog/jwt-vs-session-authentication/ Fri, 10 Jul 2026 12:00:00 GMT Compare stateless JWT authentication with server-side sessions: scalability, revocation, security, cookies, and hybrid patterns for modern APIs. https://uuidstudio.com/blog/sha256-explained-simply/ https://uuidstudio.com/blog/sha256-explained-simply/ Wed, 08 Jul 2026 12:00:00 GMT What SHA-256 does, how hashes work, collision resistance, and practical uses. Hash strings locally with a browser-based SHA-256 tool. https://uuidstudio.com/blog/convert-mongodb-binary-uuid-to-string/ https://uuidstudio.com/blog/convert-mongodb-binary-uuid-to-string/ Tue, 07 Jul 2026 12:00:00 GMT Step-by-step ways to turn BSON Binary UUIDs into canonical strings using Extended JSON, mongosh, Node, Python, and aggregation. https://uuidstudio.com/blog/hs256-vs-rs256-jwt/ https://uuidstudio.com/blog/hs256-vs-rs256-jwt/ Sun, 05 Jul 2026 12:00:00 GMT Compare HMAC HS256 and RSA RS256 for JWT signing: key distribution, performance, microservices, JWKS, and migration tips with examples. https://uuidstudio.com/blog/common-uuid-mistakes/ https://uuidstudio.com/blog/common-uuid-mistakes/ Fri, 03 Jul 2026 12:00:00 GMT Avoid the most common UUID bugs: endianness, string compare, wrong version, using UUID as secret, index anti-patterns, and log encoding issues. https://uuidstudio.com/blog/uuid-ulid-nanoid-comparison/ https://uuidstudio.com/blog/uuid-ulid-nanoid-comparison/ Wed, 01 Jul 2026 12:00:00 GMT Compare UUID, ULID, and NanoID for length, sortability, standards support, charset, and database index behavior. https://uuidstudio.com/blog/debug-invalid-jwt-errors/ https://uuidstudio.com/blog/debug-invalid-jwt-errors/ Tue, 30 Jun 2026 12:00:00 GMT Fix JWT invalid signature, malformed token, expired, wrong aud/iss, and key mismatch errors. Step-by-step troubleshooting for APIs and gateways. https://uuidstudio.com/blog/common-json-validation-errors/ https://uuidstudio.com/blog/common-json-validation-errors/ Sun, 28 Jun 2026 12:00:00 GMT Trailing commas, comments, single quotes, NaN, and duplicate keys: fix the JSON mistakes that break parsers and APIs. https://uuidstudio.com/blog/uuid-vs-auto-increment/ https://uuidstudio.com/blog/uuid-vs-auto-increment/ Fri, 26 Jun 2026 12:00:00 GMT UUID vs auto-increment primary keys: security, distributed systems, index size, JOIN performance, and practical decision framework for architects. https://uuidstudio.com/blog/why-mongodb-uuid-looks-different/ https://uuidstudio.com/blog/why-mongodb-uuid-looks-different/ Wed, 24 Jun 2026 12:00:00 GMT Same logical UUID, different hex in Compass, logs, and C#? Learn subtype, endianness, Base64, and string formatting explanations. https://uuidstudio.com/blog/how-to-compare-json-objects/ https://uuidstudio.com/blog/how-to-compare-json-objects/ Tue, 23 Jun 2026 12:00:00 GMT Deep equality, key order, arrays, and normalization: practical patterns to compare JSON objects without false positives or missed diffs. https://uuidstudio.com/blog/how-to-decode-jwt-tokens/ https://uuidstudio.com/blog/how-to-decode-jwt-tokens/ Sun, 21 Jun 2026 12:00:00 GMT Decode JWT header and payload with Base64URL, read exp and aud claims, and verify signatures without leaking tokens to untrusted servers. https://uuidstudio.com/blog/nanoid-vs-uuid/ https://uuidstudio.com/blog/nanoid-vs-uuid/ Fri, 19 Jun 2026 12:00:00 GMT NanoID vs UUID: alphabet size, collision math, performance in browser and Node, security considerations, and when short IDs beat 128-bit standards. https://uuidstudio.com/blog/mongodb-uuid-subtype-03-vs-04/ https://uuidstudio.com/blog/mongodb-uuid-subtype-03-vs-04/ Wed, 17 Jun 2026 12:00:00 GMT Compare BSON Binary subtype 03 (legacy GUID / C# byte order) with subtype 04 (RFC 4122). Learn when each appears and how to convert safely. https://uuidstudio.com/blog/json-diffing-explained/ https://uuidstudio.com/blog/json-diffing-explained/ Tue, 16 Jun 2026 12:00:00 GMT Learn how JSON diff algorithms work, when to use RFC 6902 patches, and how to present changes reviewers can trust. https://uuidstudio.com/blog/how-to-decode-jwt-safely/ https://uuidstudio.com/blog/how-to-decode-jwt-safely/ Sun, 14 Jun 2026 12:00:00 GMT Decode JWTs without leaking secrets to third-party APIs. Learn browser-local tools, redaction habits, and when decoding differs from verifying. https://uuidstudio.com/blog/ulid-vs-uuid/ https://uuidstudio.com/blog/ulid-vs-uuid/ Fri, 12 Jun 2026 12:00:00 GMT ULID vs UUID compared: sortability, encoding size, database indexing, Crockford Base32, and when to pick ULID over UUID v7 or v4. https://uuidstudio.com/blog/why-local-browser-tools-matter/ https://uuidstudio.com/blog/why-local-browser-tools-matter/ Wed, 10 Jun 2026 12:00:00 GMT UUIDs, JWTs, and JSON often contain secrets. Running tools in the browser keeps sensitive data off the server. https://uuidstudio.com/blog/how-to-validate-uuids/ https://uuidstudio.com/blog/how-to-validate-uuids/ Tue, 09 Jun 2026 12:00:00 GMT Learn to validate UUIDs: canonical format, version and variant bits, nil UUID, endianness checks, and validation patterns in Python, JavaScript, and SQL. https://uuidstudio.com/blog/how-to-pretty-print-json/ https://uuidstudio.com/blog/how-to-pretty-print-json/ Sun, 07 Jun 2026 12:00:00 GMT Indentation, line length, sorted keys, and safe redaction: pretty-print JSON for debugging without breaking production parsers. https://uuidstudio.com/blog/what-is-base64-encoding/ https://uuidstudio.com/blog/what-is-base64-encoding/ Fri, 05 Jun 2026 12:00:00 GMT Understand Base64 encoding: alphabet, padding, when to use it, and how it differs from encryption. Encode and decode locally in your browser. https://uuidstudio.com/blog/uuid-v1-v4-v7-explained/ https://uuidstudio.com/blog/uuid-v1-v4-v7-explained/ Wed, 03 Jun 2026 12:00:00 GMT Compare UUID v1, v4, and v7: how each is generated, indexing behavior, privacy implications, and which version to pick for new projects in 2026. https://uuidstudio.com/blog/how-mongodb-stores-uuids-internally/ https://uuidstudio.com/blog/how-mongodb-stores-uuids-internally/ Tue, 02 Jun 2026 12:00:00 GMT Walk through BSON Binary structure, on-disk layout, indexes, and WiredTiger storage for 16-byte UUID fields in MongoDB. https://uuidstudio.com/blog/json-vs-bson-explained/ https://uuidstudio.com/blog/json-vs-bson-explained/ Sun, 31 May 2026 12:00:00 GMT Compare JSON and BSON for APIs and MongoDB: binary layout, type support, size trade-offs, and when to convert between text and binary. https://uuidstudio.com/blog/jwt-header-payload-signature/ https://uuidstudio.com/blog/jwt-header-payload-signature/ Fri, 29 May 2026 12:00:00 GMT Deep dive into JWT header fields, registered and private claims, Base64URL rules, and how the signature is computed over header and payload. https://uuidstudio.com/blog/how-uuids-work-internally/ https://uuidstudio.com/blog/how-uuids-work-internally/ Wed, 27 May 2026 12:00:00 GMT Deep dive into UUID bit layout: version nibble, variant field, endianness, binary vs string storage, and why MongoDB UUIDs look different. https://uuidstudio.com/blog/mongodb-binary-uuid-explained/ https://uuidstudio.com/blog/mongodb-binary-uuid-explained/ Tue, 26 May 2026 12:00:00 GMT How MongoDB stores UUIDs as 16-byte BSON Binary subtype 04, how that differs from strings, and how to read and write RFC 4122 byte order correctly. https://uuidstudio.com/blog/json-vs-yaml-for-apis/ https://uuidstudio.com/blog/json-vs-yaml-for-apis/ Sun, 24 May 2026 12:00:00 GMT When to use JSON on the wire, YAML for config, and how to convert between them without type surprises. https://uuidstudio.com/blog/what-is-jwt-how-it-works/ https://uuidstudio.com/blog/what-is-jwt-how-it-works/ Fri, 22 May 2026 12:00:00 GMT Learn JSON Web Token structure, Base64URL encoding, signing, and verification flow. Decode sample JWTs safely with a local browser tool. https://uuidstudio.com/blog/what-is-a-uuid/ https://uuidstudio.com/blog/what-is-a-uuid/ Wed, 20 May 2026 12:00:00 GMT Learn what a UUID is, how the 128-bit format works, canonical string forms, and when to use UUIDs in APIs and databases. With examples and validation tips.