Fix JSON syntax errors without uploading your payload
A practical JSON debugging workflow: trailing commas, quoted keys, nested strings and large numeric IDs, with copyable examples and a local formatter.
Open the related toolTHE ENGINE1 FIELD GUIDES
Practical guides for JSON, CSS, email and video
Understand the result before you act on it. Each guide includes worked examples and a free browser tool.
PX to REM conversion with 16px and 20px root sizes
Use the actual root font size when converting pixels to rem. Compare a sizing table, negative margins, decimal rounding and browser zoom checks.
Open the related toolEstimate transactional email cost beyond the sending fee
A worked monthly email budget separates delivery fees, attachment data, setup amortization and operating time before comparing managed email and SES.
Open the related toolCalculate video bandwidth from plays, watch time and bitrate
Turn audience assumptions into delivered minutes and decimal GB, then separate storage, bandwidth and minute-based hosting charges.
Open the related toolEstimate MIME attachment size and base64 overhead
Understand why an email attachment grows in transit, compare raw and encoded sizes, and inspect a MIME sample locally without sending email.
Open the related toolHLS AVERAGE-BANDWIDTH vs BANDWIDTH for transfer estimates
Read a master M3U8 playlist, compare rendition transfer scenarios and understand why peak bandwidth, average bandwidth and media playlists differ.
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