
JSONFormatter.org
Code Beautify JSON Validator
FreeFormatter
CyberChef
IT Tools
CodeBeautify
CodeSwissKnife
55 free formatters, converters, generators, and reference tools for developers — JSON, Base64, JWT, regex, hashes, subnets. Nothing you paste is ever uploaded.

Blogtrottr
Daily Nugts - free Dynamic Newsletter
Meco
Use Digest
Feedly
Newspipe
Taco Digest
Automated email digests from Twitter, Reddit, YouTube & more

Which is more popular?
Based on our record, Mailbrew seems to be more popular. It has been mentioned 17 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | whitekit.dev | mailbrew.com |
| Pricing | — | |
| Platforms | — | |
| Listed in |
In their own words, as submitted to SaaSHub.


WhiteKit brings together 55 developer tools in one place: formatters (JSON, XML, SQL, YAML), converters, security utilities (JWT, hashing, encoding), network calculators, and text tools. Everything runs 100% client-side. Your data never leaves your device, so you can safely paste API keys,...
No description of Mailbrew yet.
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of WhiteKit.dev yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
No WhiteKit.dev videos yet. You could help us improve this page by suggesting one.
MailBrew
How often each product is chosen within a category, 0–100% relative to the other.


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


Tracking WhiteKit.dev since Aug 2026.
I really like Mailbrew. Daily email digests from RSS feeds (and a bunch of other stuff). https://mailbrew.com/. - Source: Hacker News / over 1 year ago
That's super cool! Your product reminds me of https://mailbrew.com/ which I used for a couple of years > Wonder if you'd be willing to add email support? I might add support for Kindle/Supernote and send a PDF by email to them, but I... - Source: Hacker News / almost 2 years ago
— Filters for the incoming emails Alternatives: About a year ago, I found out, that the guys from https://mailbrew.com/ have an essentially identical product, which I used for a few months myself. The product is quite nice, but for my... - Source: Hacker News / over 3 years ago
When comparing WhiteKit.dev and Mailbrew, you can also consider the following products.

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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Track RSS feeds and send updates to your email inbox.
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Code Beauty’s JSON Validator or JSON Lint is easy to use tool to copy, paste and validate JSON data.
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100+ newsletters packaged in a daily recap, for you only
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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.
Compare FreeFormatter to WhiteKit.dev or Mailbrew:
