
JSONLint
JSONFormatter.org
FreeFormatter
JSON Formatter & Validator
ExtendsClass JSON Formatter
Site24x7 JSON Formatter and Validator
betterjson.com
Code Beauty’s JSON Validator or JSON Lint is easy to use tool to copy, paste and validate JSON data.

JSONFormatter.org
JSONLint
CodeBeautify
FreeFormatter
10015.io
DevPicker
DevSolvev2
Browser-based developer tools for JSON, text, encoding, hashing, DNS and SEO tasks. No account needed.
Which is more popular?
Website, pricing, platforms and company facts side by side.
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| Website | codebeautify.org | trexmi.com |
| Pricing | — | |
| Platforms | — | |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Code Beautify JSON Validator yet.
Trexmi is a collection of 227 focused developer utilities that run in the browser, with no account required for everyday use. Most tools process data locally: JSON formatting, validation, sorting and conversion; text transforms, counters and extraction; Base64, URL and HTML encoding; hashing and...
What each product offers, as listed by its team.


Possible disadvantages
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Code Beautify JSON Validator and Trexmi.
Trexmi's answer:
Two things. First, most tools run entirely in the browser — JSON, text, encoding, hashing and regex never send input to a server, so there is no upload step and no round trip. Second, every utility has its own page with worked examples and notes on edge cases, rather than a single dashboard hiding 200 tools behind a dropdown. Its text-processing core has been extracted and released separately under MIT.
Trexmi's answer:
If the work is a one-off format or decode, most established tools handle it fine. Trexmi is a better fit when the data should not leave the machine, when the payload is large enough that a server round trip is noticeable, or when the task is newer than the incumbents cover — MCP tool schemas, OpenAI function schemas, JSON to Zod or Pydantic, cURL conversion. It is also signup-free with no daily limits on local tools.
Trexmi's answer:
Developers and technical staff doing everyday data work: inspecting API responses, converting between formats, generating types from JSON, decoding tokens, checking DNS and TLS, and validating sitemaps or structured data. Also people building on LLMs who need tool schemas and token estimates.
Trexmi's answer:
It started as a set of scripts kept around for repeated tasks — formatting JSON, converting feeds, cleaning text — and turned into a site once the same problems kept coming back. The processing later moved from the server into the browser, which removed the latency and meant the data no longer had to be trusted to anyone. That port was verified byte for byte against the original PHP and released as an open-source library.
Trexmi's answer:
PHP on the server, vanilla JavaScript on the client with no framework, WordPress as the content and routing layer. Browser-side processing uses standard platform APIs — Intl.Segmenter for grapheme handling, TextEncoder for UTF-8, Web Crypto where hashing is done locally.
Share your experience with using Code Beautify JSON Validator and Trexmi. For example, how are they different and which one is better?
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JSON Lint is a web based validator and reformatter for JSON, a lightweight data-interchange format.
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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
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Freeformatter is a platform that contains free online tools for developers, including formatters (json, html, xml, sql, etc.), minifiers (css, javascript), compactors, validators, and much more.
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Online Tools like Beautifiers, Editors, Viewers, Minifier, Validators, Converters for Developers: XML, JSON, CSS, JavaScript, Java, C#, MXML, SQL, CSV, Excel
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The JSON Formatter was created to help with debugging.
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ExtendsClass JSON Formatter is a tool that allows you to beautify, minify, validate, view, and escape JSON code.
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