
JSONLint
JSON Formatter & Validator
JSON Editor Online
CodeBeautify
FreeFormatter
iLovePDF
Code Beautify JSON Validator
Online JSON Formatter and JSON Validator will format JSON data, and helps to validate, convert JSON to XML, JSON to CSV. Save and Share JSON

AgentGatePay
x402
Real-world tasks your agent can't do alone.

Which is more popular?
Based on our record, JSONFormatter.org seems to be a lot more popular than Underscore Done. While we know about 29 links to JSONFormatter.org, we've tracked only 1 mention of Underscore Done.
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | jsonformatter.org | underscoredone.com |
| Pricing | — | |
| Company | Startup from the United States | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of JSONFormatter.org yet.
Underscore Done (_done) is a suite of pay-per-call utility APIs built for AI agents. No API keys, no subscriptions - agents pay per request with USDC via the x402 protocol
What each product offers, as listed by its team.


Possible disadvantages
No features have been listed yet.
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
No analysis of Underscore Done yet.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing JSONFormatter.org and Underscore Done.
Underscore Done's answer:
We provide data and actions that AI cannot achieve.
Also we don't require accounts, registration, api keys. And we charge per usage and never charge monthly subscriptions.
Underscore Done's answer:
Ai Agents that work on behalf of people.
Share your experience with using JSONFormatter.org and Underscore Done. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


JSONFormatter.org is an invaluable tool for anyone working with JSON data. Its simple and user-friendly interface makes formatting, validating, and analyzing JSON effortless. The website's clean design allows for easy...
We have no reviews of Underscore Done yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Note: It is crucial that your batchinput.jsonl file is correctly formatted. You can use online JSON formatters and validators like jsonformatter.org or jsonlint.com to verify its integrity before proceeding. - Source: dev.to / about 1 year ago
Online Tools: Websites like JSONLint or jsonformatter.org let you paste JSON and get a minified version instantly. - Source: dev.to / about 1 year ago
JSON Formatter & Validator This tool focuses on formatting JSON data while offering basic diff capabilities. • Features: Validate, format, and compare JSON data. • Use Case: Ideal for developers who need an all-in-one solution. •... - Source: dev.to / almost 2 years ago
_done is a catalog of small, pay-per-call utility APIs aimed at AI agents: things like DNS and WHOIS lookups, screenshots, OCR, hashing, QR codes, and SEO extraction. Every call costs one cent in USDC over x402. There's no account and no... - Source: dev.to / 9 days ago
When comparing JSONFormatter.org and Underscore Done, you can also consider the following products.

JSON Lint is a web based validator and reformatter for JSON, a lightweight data-interchange format.
Compare JSONLint to JSONFormatter.org or Underscore Done:

Enable AI agents to make autonomous payments with AP2 mandates and X402 protocol. Multi-chain crypto, budget controls, instant settlement.
Compare AgentGatePay to JSONFormatter.org or Underscore Done:

The JSON Formatter was created to help with debugging.
Compare JSON Formatter & Validator to JSONFormatter.org or Underscore Done:

An open protocol for internet-native payments from Coinbase
Compare x402 to JSONFormatter.org or Underscore Done:
View, edit and format JSON online
Compare JSON Editor Online to JSONFormatter.org or Underscore Done:

Online Tools like Beautifiers, Editors, Viewers, Minifier, Validators, Converters for Developers: XML, JSON, CSS, JavaScript, Java, C#, MXML, SQL, CSV, Excel
Compare CodeBeautify to JSONFormatter.org or Underscore Done: