Dev tools · alternatives · 2026
24 alternatives to Flatten JSON Online
Free json flattener tool
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
- 1
Free Online JSON to JSONL Converter Tool
2025 · merge-json-files.com · its alternatives →
- 2
Free json converter tool
2025 · merge-json-files.com · its alternatives →
- 3
Discover and manipulate any JSON document
2021 · chromewebstore.google.com · its alternatives →
- 4
Effortless JSON Editing, Anywhere!
2023 · chromewebstore.google.com · its alternatives →
- 5
JSON Sharp▲73Tool for lazy developers to convert JSON to C# Objects
2020 · jsontocsharpconverter.web.app · its alternatives →
- 6
Useful JSON online tools
2022 · jsonformatter.net · its alternatives →
- 7
Split large JSON files online quickly and easily 100% free
2025 · merge-json-files.com · its alternatives →
- 8
Quickly formats JSON with a simple right click, no copy
2023 · chromewebstore.google.com · its alternatives →
- 9
Format, validate and beautify json
2025 · formatjsononline.com · its alternatives →
- 10
50+ free JSON tools that run entirely in your browser
Jun 2026 · mergejsonfiles.com · its alternatives →
- 11
- 12
- 13
json formatter online, online json tool, format json
2025 · its alternatives →
- 14
Free JSON viewer, formatter & converter in your browser
2025 · json-viewer-ce3.pages.dev · its alternatives →
- 15
Instantly format, beautify, and view your JSON data online.
2025 · json-formatter-dev.vercel.app · its alternatives →
- 16
It’s fast, free, and doesn’t require any sign-up. Just upload your files, and it merges them into one clean JSON output. I made this because I kept running into small but annoying JSON merging tasks while working on side projects — especially when dealing with API responses, config files, or datasets. Most existing tools were either CLI-only, full of ads, or had weird size limits. So I built my own.
2025 · merge-json-files.com · its alternatives →
- 17
JSONBason▲15I've been at it again, just sharing my simple JSON data inspection tool, love webdev and single page apps, this one took 4 days and was a lot of fun. The code is not obfuscated so you can inspect it and see how it works (very simple, server side is even more simple) Pretty much just do a POST of your JSON data from within your code and it will convert it into a basic table for instant search and sort. Made with love for the fun of it, no ads, no paid anything, it's totally free. Please only send in sanitized/test data only, this is meant to help make webdev a bit easier and more fun.…
2025 · jsonbason.com · its alternatives →
- 18
Free online json formatter, validator & editor tool
2025 · onlinejsonutils.com · its alternatives →
- 19
- 20
JSONKit▲447 free JSON tools — all in your browser, zero uploads
Jun 2026 · jsonkit.in · its alternatives →
- 21
- 22
Efficient JSON editing with one-click formatting & search
2025 · its alternatives →
- 23
Format, validate and minify JSON instantly
Jun 2026 · tools.bmjapps.in · its alternatives →
- 24
Free, visual JSON editor - Validation, Type Support etc
Nov 2025 · visualjsoneditor.com · its alternatives →
Also compare
Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →