F
Web product
Added October 23, 2026
About the product
FlatNest is a free online JSON flattener and unflattener. Paste nested JSON and get flat dot-notation keys (user.profile.email), or turn a flat key map back into nested objects. Choose dot, underscore or slash separators, expand array indexes or keep arrays as values, then copy or download the result. Everything runs locally in your browser: no upload, no signup. Handy for CSV/BI exports, env-style configs, Elasticsearch mappings and API payload diffs.
0 recommendations
Recommendations are a community signal, not a verified count.
Share FlatNest with your network.
Community notes
Feedback & updates
No notes yet
Have experience with FlatNest, or something new to share? Add the first useful note.
For product owners
Promote FlatNest
Every listing gets one post to our X and Threads followers. It is seen once, then the traffic stops. Promotion keeps FlatNest in front of people instead.
- Back in the X and Threads rotation: FlatNest gets posted again instead of once.
- A promoted slot on the AppRater homepage, carrying a Promoted badge.
- A direct link to FlatNest from a DR41 site (Ahrefs Domain Rating), with no redirect in between.
- A labelled spot in the weekly email to AppRater subscribers, one promoted app per issue.
- Stays on the first screen however old the listing is, while new submissions push everything else down.
For ownersOwn FlatNest? You can add a deal, post a role or put the badge on your own site.