7 min read
How to validate JSON without uploading sensitive data
A safe, repeatable method for validating JSON locally, interpreting parser errors and recording useful evidence without exposing production payloads.
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DailyITTools Engineering
The accountable product and engineering authorship team behind DailyITTools guides. Coverage includes browser-side data tooling, encoding, identity artefacts and reproducible IT operations.
How authorship works
Each published guide must have an accountable human reviewer who checks examples, source links, risk language and product claims. The organizational byline avoids inventing individual credentials while ownership is being finalized.
Review standard
We prefer primary standards and recognized security authorities, separate observation from interpretation, and update dates only after substantive changes.
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8 min read
Common JSON errors and how to fix them
Diagnose missing commas, invalid quotes, trailing commas, broken escapes and unexpected tokens without guessing or rewriting the whole payload.
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JSON versus YAML: how to convert without changing meaning
Understand quoting, scalar types, duplicate keys, anchors and multi-document input before converting configuration between JSON and YAML.
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Base64 is encoding, not encryption
Learn what Base64 changes, why it provides no confidentiality and how padding, Unicode and binary data cause common decoding failures.
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URL encoding: a practical guide for query strings and paths
Understand percent-encoding, plus signs, reserved characters and double-encoding before constructing or diagnosing web requests.
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JWT decoding versus verification: what the result actually proves
Learn why readable JWT claims are not trustworthy until the signature, algorithm, issuer, audience and time rules are verified in the correct security context.
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Understanding JWT exp, nbf and iat time claims
Convert JWT NumericDate values correctly and diagnose expiry, not-before and issued-at failures without confusing time zones or clock skew.
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SHA-256 versus HMAC: integrity, authentication and common mistakes
Understand why a plain hash cannot authenticate a message and how HMAC combines a secret key with a hash for integrity and origin checks.
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Unix timestamps for incident response and log correlation
Convert epoch values reliably, distinguish seconds from milliseconds and correlate events across UTC, local time and systems with clock drift.
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How to write a reproducible technical troubleshooting note
Capture observations, safe evidence, environment and next steps so another engineer can reproduce the investigation without receiving secrets or customer data.
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