The latest articles on DEV Community by John Berk (@e_b0ea8c08c). https://dev.to/e_b0ea8c08c https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3779017%2F77e54c57-7c48-4652-a742-1e999f29dfb0.jpg https://dev.to/e_b0ea8c08c en John Berk Wed, 18 Feb 2026 09:26:44 +0000 https://dev.to/e_b0ea8c08c/5-common-json-mistakes-developers-make-ocb https://dev.to/e_b0ea8c08c/5-common-json-mistakes-developers-make-ocb <p>After working with APIs for years, I’ve noticed these common JSON mistakes:</p> <ul> <li><p>Trailing commas</p></li> <li><p>Missing quotes around keys</p></li> <li><p>Single quotes instead of double quotes</p></li> <li><p>Invalid nesting</p></li> <li><p>Copy-pasted minified JSON without formatting</p></li> </ul> <p>Debugging these manually wastes a lot of time.</p> <p>That’s actually why I built a small tool to instantly format and validate JSON while highlighting the exact error location.</p> <p>👉 myjsontool.com</p> <p>If anyone’s interested, I’d love feedback on improving it.</p> <p>What JSON issues frustrate you the most?</p> api beginners showdev webdev