MockTurtle.net
Dadroit JSON Viewer
Jayson
ExtendsClass JSON Generator
Mockaroo
Fullstack Vue
DevToys
Create mock and sample JSON using a powerful template syntax

MockTurtle.net
MockBlast
Random Data
SQLable
DDL to Data
dbForge Data Generator for MySQL
Mockaroo
Realistic multi-table test data with foreign keys intact. Every dataset's first 20,000 rows are free, no credit card. Design visually or in plain English, then export to 7 SQL dialects, CSV, JSON, JSONL and Parquet.

Which is more popular?
Based on our record, JSON Generator seems to be more popular. It has been mentioned 9 times since March 2021.
Website, pricing, platforms and company facts side by side.
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JSO
JSON Generator
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| Website | json-generator.com | synthforge.io |
| Pricing | — | |
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What each product offers, as listed by its team.

Possible disadvantages
No features have been listed yet.
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using JSON Generator and SynthForge IO. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

JSON Generator: also generates mock data, but for JSON specifically. It's a bit more complex, but it allows for tailor-made results. - Source: dev.to / almost 3 years ago
Is there a generator for all the JSON generators out there? https://json-generator.com/. - Source: Hacker News / about 3 years ago
So I generated a random JSON file and tried parsing it. It doesn’t error, but whenever I do a println(root.Object().Value().String()), I get a panic: wrong type. If I do a println(root.Object().Present()), it prints false. So seems like... Source: over 3 years ago
Tracking SynthForge IO since Nov 2026.
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Open a 1GB JSON file in a blink 💣
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Generate random data for testing
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ExtendsClass's JSON generator allows to generate random JSON data from a template.
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