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Collaboration app for UI designers & frontend developers

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Free network, security, coding & text tools that run entirely in your browser. No install, no sign-up; nothing you enter is sent to a server.

Which is more popular?
Based on our record, Zeplin seems to be more popular. It has been mentioned 23 times since March 2021.
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | zeplin.io | developk.kr |
| Pricing | ||
| Platforms | — | |
| Company | Startup from the United States | Startup from South Korea · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Zeplin yet.
Free online developer utilities — network, security, coding & text tools. No install, no sign-up; nothing you enter is sent to a server. 설치·회원가입 없이 브라우저에서 바로 쓰는 무료 개발자 유틸리티 모음 (네트워크·보안·코딩·텍스트 61개 도구). 입력값 서버 전송 없음.
What each product offers, as listed by its team.


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


Overall verdict
Why this product is good
Recommended for
Zeplin is best suited for designers and developers working in teams where clear design specifications and organized collaboration are critical. It's particularly beneficial for teams using Figma, Sketch, or Adobe XD who want to ensure precise design implementation and reduce misunderstandings between design and development departments.
No analysis of DevelopK.kr yet.
Walkthroughs and reviews on video.
Zeplin Basics: Design Systems
More videos
No DevelopK.kr videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Zeplin and DevelopK.kr.
DevelopK.kr's answer:
developk.kr offers 61 free developer tools you can use instantly in your browser, no sign-up required. All processing happens client-side, so nothing you type is sent to a server. The tools are organized into 4 categories (network, security, coding, text), and 15 written guides are included to help you use them.
DevelopK.kr's answer:
Developers and engineers who run into small, repetitive tasks during their workday, things like formatting JSON, generating a hash, checking DNS records, or converting units, and want a fast browser-based tool instead of hunting through ad-heavy sites. It's also popular with solo developers and freelancers who value the no-signup, privacy-friendly approach.
DevelopK.kr's answer:
developk.kr started as a single indie side project: small dev tools built one at a time to solve the maker's own recurring annoyances, like reformatting a messy JSON blob or looking up DNS records, on sites full of ads and forced sign-ups. Each tool was added because it was genuinely needed for real work, and the collection has since grown to 61 tools across 4 categories, plus 15 written guides.
DevelopK.kr's answer:
Most online tool sites require sign-up, run ads, or collect your email before you can use them. developk.kr skips all of that. Because everything runs client-side in your browser, it's also safe to paste sensitive values like API responses or auth tokens without worrying about where that data goes.
DevelopK.kr's answer:
developk.kr is built as static HTML/CSS/JavaScript (no backend framework), with a shared common.js handling the header, footer, and ad mounting across all tool pages. It's hosted and served through Cloudflare (Pages, with redirects handled via a Cloudflare Pages Function), and uses GA4 for analytics.
Share your experience with using Zeplin and DevelopK.kr. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


As aforementioned, Zeplin suffers some inherent drawbacks that may dent designers’ hopes for faster, easy, and reliable UI design. To avert such scenarios, you don’t have to get stuck with Zeplin as there are numerous...
Zeplin is super affordable. It offers 2 plans: Team, which costs $8.00 per user per month, and Establishment, which costs $16.00 monthly. Zeplin also provides a feature-limited Free Plan and Enterprise Plan.
Zeplin is a workspace collaboration tool to document what to build and how designs should behave in a central collaborative place for the entire dev team.
We have no reviews of DevelopK.kr yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Tools like Zeplin's AI layer, Supernova, and the emerging generation of Figma plugins with AI backends do this today. The output is not a PDF full of screenshots. It is structured data: exact values, token references, and context — the... - Source: dev.to / 6 months ago
Zeplin.io AI-powered design-to-dev handoff. - Source: dev.to / over 1 year ago
Additionally, thank you to all our community launch partners across the frontend ecosystem for helping us bring Storybook 8 to the world! Thanks to Chromatic, Figma, ViteConf, Omlet, DivRiots, story.to.design, StackBlitz, UXpin, Nx, Mock... - Source: dev.to / over 2 years ago
Tracking DevelopK.kr since Jul 2026.
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