https://devsnap.cc/guides/ Longer explanations of the concepts behind the tools: JSON, regex, time zones, diffs, tokens and the rest. en https://devsnap.cc/guides/common-json-errors/ https://devsnap.cc/guides/common-json-errors/ Sun, 18 Oct 2026 00:00:00 GMT The six JSON mistakes behind almost every parse error: trailing commas, single quotes, unquoted keys, comments, smart quotes and truncation. https://devsnap.cc/guides/base64-is-not-encryption/ https://devsnap.cc/guides/base64-is-not-encryption/ Sun, 18 Oct 2026 00:00:00 GMT What Base64 actually does, why it is not a security measure, when it is the right tool, and the three cases where people reach for it by mistake. https://devsnap.cc/guides/http-cache-headers/ https://devsnap.cc/guides/http-cache-headers/ Sun, 18 Oct 2026 00:00:00 GMT How HTTP caching works: what Cache-Control directives mean, what an ETag is, what Vary does, and how a misconfigured header serves the wrong page. https://devsnap.cc/guides/api-error-responses/ https://devsnap.cc/guides/api-error-responses/ Sun, 18 Oct 2026 00:00:00 GMT What an API error body should contain, which status code to use, and how to keep errors debuggable without leaking internals. https://devsnap.cc/guides/webhook-signatures/ https://devsnap.cc/guides/webhook-signatures/ Sun, 18 Oct 2026 00:00:00 GMT How to verify that a webhook really came from the provider: HMAC signatures, the raw body requirement, replay protection and constant-time comparison. https://devsnap.cc/guides/shell-quoting-and-escaping/ https://devsnap.cc/guides/shell-quoting-and-escaping/ Sun, 18 Oct 2026 00:00:00 GMT Why unquoted variables break, the difference between single and double quotes, and how to pass a value to another command safely. https://devsnap.cc/guides/id-strategies/ https://devsnap.cc/guides/id-strategies/ Sun, 18 Oct 2026 00:00:00 GMT How to choose an identifier: random UUIDv4, time-ordered UUIDv7, ULID, Snowflake and auto-increment, with the index and privacy trade-offs. https://devsnap.cc/guides/sql-injection-explained/ https://devsnap.cc/guides/sql-injection-explained/ Sun, 18 Oct 2026 00:00:00 GMT What SQL injection is, how string concatenation creates it, why parameterised queries fix it, and the cases where the danger is not the database at all. https://devsnap.cc/guides/regex-patterns-worth-knowing/ https://devsnap.cc/guides/regex-patterns-worth-knowing/ Tue, 13 Oct 2026 00:00:00 GMT Twelve regular expressions for the tasks that come up in every project: email, URL, dates, UUIDs, semantic versions and log levels, with the caveats. https://devsnap.cc/guides/how-to-read-a-json-web-token/ https://devsnap.cc/guides/how-to-read-a-json-web-token/ Sun, 11 Oct 2026 00:00:00 GMT A practical guide to reading a JSON Web Token: what the header and payload contain, why the payload is readable by anyone, and how to check expiry. https://devsnap.cc/guides/cron-expressions-cheat-sheet/ https://devsnap.cc/guides/cron-expressions-cheat-sheet/ Fri, 09 Oct 2026 00:00:00 GMT The five fields of a Unix cron expression, the day-of-month and day-of-week rule that catches everybody, and the equivalents for AWS, Quartz and GitHub. https://devsnap.cc/guides/wcag-contrast-for-developers/ https://devsnap.cc/guides/wcag-contrast-for-developers/ Thu, 08 Oct 2026 00:00:00 GMT What the contrast requirements actually are, which ones apply to your UI, and how to fix a failing pair without redesigning the brand palette. https://devsnap.cc/guides/utc-versus-local-time/ https://devsnap.cc/guides/utc-versus-local-time/ Wed, 07 Oct 2026 00:00:00 GMT Why storing local time is a bug waiting to happen, how daylight saving breaks naive date arithmetic, and the formats you should use. https://devsnap.cc/guides/what-a-good-diff-looks-like/ https://devsnap.cc/guides/what-a-good-diff-looks-like/ Sun, 04 Oct 2026 00:00:00 GMT Why line diffs are too coarse, when word-level highlighting helps, and how structural comparison changes the way you read a payload that changed shape. https://devsnap.cc/guides/utm-parameter-naming/ https://devsnap.cc/guides/utm-parameter-naming/ Sat, 03 Oct 2026 00:00:00 GMT How to pick UTM source, medium and campaign values that produce a readable report, and why the casing decides whether a campaign is one row or five. https://devsnap.cc/guides/environment-variables-safely/ https://devsnap.cc/guides/environment-variables-safely/ Wed, 30 Sep 2026 00:00:00 GMT How to keep credentials out of version control and out of your shell history, and how to debug a variable that is not being picked up.