Pretty Fish: A better mermaid diagram editor (pretty.fish)
126 points by pastelsky 6 days ago
Myrmornis 5 hours ago
https://d2lang.com/ is a nicer language than Mermaid with much nicer visual appearance. It would be great if it became more widely supported.
erajasekar 4 hours ago
I reached the same conclusion after comparing diagram-as-code tools — D2 feels cleaner and more expressive than Mermaid.
I’ve been working on an AI diagramming tool built around D2: https://aidiagrammaker.com/ You describe a system in plain English, and it generates architecture diagrams, flowcharts, and sequence diagrams in D2.
Edits can be made either directly in the D2 code or via a context-aware editor.
neuronexmachina 4 hours ago
I agree that it's nicer and more powerful, but it's a little concerning it hasn't had any commits in the past 6 months: https://github.com/terrastruct/d2/commits/master/
16bitvoid 2 hours ago
I think the founder/lead developer, Alexander Wang, works at OpenAI now.
Plus, according to this comment on an issue, folks in their discord say it's not being actively maintained.
https://github.com/terrastruct/d2/issues/2735#issuecomment-4...
vladsanchez an hour ago
nine_k 2 hours ago
Maybe it doesn't need constant fixing? Are there many issues in the tracker?
wps an hour ago
Has anyone here used https://pikchr.org/ from the creator of SQLite?
spacecow 3 hours ago
Oh, finally, something that supports actual hierarchical state diagrams (that isn't Graphviz, no offense)... Mermaid's "You cannot define transitions between internal states belonging to different composite states" [1] has driven me up a wall for years.
parentA.childA -> parentB.childB: voop
parentB.childB -> parentA: vorp
[1] https://mermaid.ai/open-source/syntax/stateDiagram.html#comp...
lugao 5 hours ago
Does it produce real svgs as opposed to foreign object html in svg mess that mermaid compilers produce?
growrow 5 hours ago
What makes it nicer?
Myrmornis 4 hours ago
Take a look at https://d2lang.com/examples/dagre/ and https://d2lang.com/tour/intro/
The language is richer and all diagram types are implemented consistently in the same language in a way that can be composed, as opposed to being a collection of unrelated DSLs.
The improved visual appearance is clear from inspecting example diagrams, I believe.
jauntywundrkind 3 hours ago
How good is the LLM at creating d2? What if any skills/material can folks recommend? (Follow-up: D2-mcp has a cheat sheet, https://github.com/h0rv/d2-mcp/blob/main/d2/CHEATSHEET.md)
And, does GitHub support it? (Follow up: alas not! Sadness. Please add!)
lo1tuma 37 minutes ago
I actually like Mermaid’s text-based approach a lot and wouldn’t want to replace it with a visual editor.
Where I do see room for improvement is the rendering quality. A lot of diagrams end up looking a bit rough, especially with arrow routing and layout, which can feel somewhat arbitrary.
Better layout/rendering would probably add more value (for me at least) than improving the editing experience.
juancn 2 hours ago
It's pretty but I don't know about better.
- How do you pan? Two finger sliding on the trackpad just zooms.
- Why does the diagram you're working on doesn't use all the remaining space? I picked one example and it's on a small-ish box with controls that don't seem to do anything and half of it is out the screen on the bottom
Ohh... the scroll metaphor... it's annoying. A bunch of tabs would have been better or even a one at a time with a tree somewhere.
There's too much fighting with layout where a plain interface would be better, something closer to https://mermaid.live/
smusamashah 3 hours ago
How is this one better? I thought this was going to be a visual editor where you click and edit on the diagram itself. I don't seem to be able to do that here.
Arubis 5 hours ago
I will grant this: that's a brilliant name and domain.
laserbeam 5 hours ago
The first thing I tried to do is resize that rectangle in the default diagram... and the resize handles do not affect the height, only the width. What is this "better" than?
Lord_Zero 4 hours ago
How does the agent session thing work? Server-side you proxy requests to client via websockets or something? How does the agent see the client-side data?
pastelsky 6 days ago
- Write Mermaid diagrams with a live preview. - Arrange multiple diagrams on an infinite canvas. - Group diagrams into multi-page projects. - Better themes
Flavius 5 hours ago
Make no mistakes.
rdos 6 hours ago
I can't seem to change the colors of the pie chart, other than the predefined themes. But all of those are horrible for a pie chart.
jsmith45 5 hours ago
Yeah, as far as I know, you need to define a customized theme to customize pie chart colors. You can prepend the chart with initialization logic like:
%%{init: {"theme": "base", "themeVariables": { "pie1": "#FF5733", "pie2": "#33FF57", "pie3": "#3357FF", "pieStrokeColor": "#000000", "pieStrokeWidth": 3, "pieOpacity": 0.8 }}}%%
This looks like it works on this site too.
pjot 5 hours ago
To be fair, pie charts are horrible in general.