SafeJSON vs jsonformatter.org
SafeJSON is a jsonformatter.org alternative built around verifiable privacy. Open DevTools -> Network, paste JSON, and check that no request contains your data while it is processed locally.
| Feature | SafeJSON | jsonformatter.org |
|---|---|---|
| Processing | Client-side. No pasted-content upload. | Server-side. Data is transmitted to remote infrastructure. |
| Verifiable privacy | Yes. Open DevTools -> Network and check that no request contains pasted JSON. | No. The tool depends on server-side processing. |
| Data breach history | None. No server-side JSON storage pipeline. | 80K+ credentials exposed in November 2025. |
| Open source | Yes. MIT license on GitHub. | No. Closed source. |
| Ads | None. | Yes. Ad-supported. |
| JSON Diff | Yes (Pro). | No. |
| JWT Decoder | Yes (Pro). | No. |
| JSONPath | Yes (Pro). | No. |
| Schema Validator | Yes (Pro). | No. |
| Large files | Large local handling (Formatter tested with 50MB). | Limited by upload and server workflow. |
| Price | Free core tools, $5/month Pro. | Free with ads. |
What happened at jsonformatter.org
In November 2025, security researchers reported that jsonformatter.org and codebeautify.org exposed more than 80,000 user-submitted snippets through an unprotected feature.
The exposed data included Active Directory credentials, AWS keys, GitHub tokens, database passwords, and banking PII. The core lesson is simple: if a JSON tool sends your data to a server, that server becomes part of your threat model.
Why SafeJSON is different
SafeJSON processes JSON with client-side JavaScript. There is no server-side JSON formatter endpoint receiving your data, no ads, and no analytics event that includes pasted JSON. You can verify the privacy claim yourself instead of trusting marketing copy.
How to verify any JSON tool
- Open the tool in your browser.
- Open DevTools and switch to the Network tab.
- Paste JSON and run the formatter, viewer, diff, decoder, or parser.
- If a new request contains your data, the tool uploaded it. SafeJSON does not upload pasted JSON while processing it.
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