NASM
Yasm
Easy code
Pelles C
GNUSim8085
86Box
JWasm
A fast and efficient self-assembling x86 assembler for DOS, Windows and Linux.

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.

Which is more popular?
Based on our record, flat assembler seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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flat assembler
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| Website | flatassembler.net | whitekit.dev |
| Pricing | — | |
| Platforms | — | |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of flat assembler yet.
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,...
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.

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

Oh neat! Thanks for the link, I hadn't heard of fasmg before. It looks like fasmg builds up from the byte level, so it would only work for architectures that use 8-bit words. Torque builds up from the bit level, so it can assemble code... - Source: Hacker News / over 1 year ago
Tracking WhiteKit.dev since Aug 2026.
When comparing flat assembler and WhiteKit.dev, you can also consider the following products.

The Netwide Assembler, NASM, is an 80x86 and x86-64 assembler designed for portability and...
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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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Yasm is a complete rewrite of the NASM assembler.
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Code Beauty’s JSON Validator or JSON Lint is easy to use tool to copy, paste and validate JSON data.
Compare Code Beautify JSON Validator to flat assembler or WhiteKit.dev:

Easy Code is the visual assembly programming environment made to build 32-bit Windows applications.
Compare Easy code to flat assembler or WhiteKit.dev:

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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