
SequenceDiagram.org
js-sequence-diagrams
WebSequenceDiagrams
LucidChart
PlantUML
yEd
Dia
Swimlanes.io is a simple free online tool for making sequence diagrams.

DevTools Advanced
FullStackToolkit
DevFinanceTools
JSON Formatter & Validator
AllDevToolsHub
Boop
DeveloperTools.Tech
120 free browser-based developer utilities. No sign-up required.

Which is more popular?
Based on our record, Swimlanes.io seems to be more popular. It has been mentioned 7 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | swimlanes.io | devtoolstack.io |
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What each product offers, as listed by its team.


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


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


Https://d2lang.com/ is really nice. Also I used to use https://swimlanes.io/ before d2. - Source: Hacker News / almost 2 years ago
Swimlane diagrams are from the 1940s[0]. IGrafx trademarked it in 1996. They're often used to model process' that span people, roles or security boundaries [1][2][3]. Sequence-diagram participants[4], and gantt-sections[5] are... - Source: Hacker News / about 2 years ago
Swimlanes is a simple implementation of the same concept. https://swimlanes.io/. - Source: Hacker News / about 3 years ago
Tracking DeveloperToolStack since Aug 2026.
When comparing Swimlanes.io and DeveloperToolStack, you can also consider the following products.

Clean and fast online sequence diagram tool using scripting and Drag and Drop
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A collection of developer tools in one place in your browser
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js-sequence-diagrams turns text into UML sequence diagrams.
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Free, no-signup developer tools for technical SEO: robots.txt, sitemap.xml and .htaccess generators, plus practical guides. Everything runs in your browser.
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WebSequenceDiagrams is a web-based application that allows the user to use a proprietary language to define sequence diagram.
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Free, no-signup calculators for the money side of building software and freelancing
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