
CyberChef
DevToys
JSON-Formatter.app
CodeTray.dev
CodifyFormatter.org
Devrian.in
DuskTools.app
Fast, private developer tools in your browser. JSON formatter, Regex tester, Cron generator, and 17 more.

Rarible
MetaMask.io
SuperRare
Nifty Gateway
ICODrops
SHOWTIME
Crypto.com
Ebay for cryptogoods. Buy and sell items on the blockchain.

Which is more popular?
Based on our record, OpenSea seems to be more popular. It has been mentioned 600 times since March 2021.
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | codeutil.dev | opensea.io |
| Pricing | — | |
| Listed in |
In their own words, as submitted to SaaSHub.


CodeUtil.dev is a collection of 20+ browser-based developer tools. JSON formatter & validator, regex tester, cron expression generator, Base64 encoder/decoder, JWT debugger, URL parser, hash generator, and more. Everything runs client-side — no data leaves your browser. No sign-up needed,...
No description of OpenSea yet.
What each product offers, as listed by its team.


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


Overall verdict
Why this product is good
Recommended for
No analysis of OpenSea yet.
Walkthroughs and reviews on video.
No CodeUtil.dev videos yet. You could help us improve this page by suggesting one.
Rarible VS OpenSea, Which is better? (FAIR Comparison Review)
More videos
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing CodeUtil.dev and OpenSea.
CodeUtil.dev's answer
CodeUtil.dev runs entirely in the browser — all processing happens on your device, so your data never touches a server. It bundles 20+ tools (JSON, regex, Base64, JWT, cron, hashing, and more) under one roof with zero sign-up. Just open the page and start working.
Share your experience with using CodeUtil.dev and OpenSea. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Tracking CodeUtil.dev since Mar 2026.
Dapps power a wide range of industries - from DeFi platforms like Uniswap, to NFT marketplaces like OpenSea, and Web3 games like Axie Infinity. - Source: dev.to / 7 months ago
Dive deep into user needs and market culture. When Opensea launched in 2018, it faced competitors with more funding and high-profile investors. However, @dfinzerand @xanderatallah succeeded by prioritizing product value over superficial... - Source: dev.to / 7 months ago
NFT Proxy Purchases: Bidding and purchasing on OpenSea or Blur based on user instructions. - Source: dev.to / 9 months ago
When comparing CodeUtil.dev and OpenSea, you can also consider the following products.


Create, sell, collect digital items secured with blockchain
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A crypto wallet & gateway to blockchain apps
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json-formatter.app is a free online tool that offers one-click copying, direct file conversion, and downloads. With open-source code and multilingual support, it features JSON beautification and parsing, as well as conversion to other formats like XM
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Create, collect and trade rare crypto art and collectibles
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