Life & fun · February 28, 2017
Online Haskell REPL
We heard your requests for Haskell and today we're excited to finally announce Haskell as yet another language we support. We've decided to put our focus...
Online Haskell REPL launched on February 28, 2017 with 82 votes, #513 of 3,156 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 9 years on.
In plain words
Online Haskell REPL is a browser-based environment for writing and executing Haskell code on Replit. It allows users to write functional programs directly in their browser without local installation. The tool functions similarly to ghci but has some limitations: output only displays after program completion and input through stdin is not supported. It is designed for developers and students learning or practicing Haskell programming.
written from the facts on this page · September 2026
From the sources
We heard your requests for Haskell and today we're excited to finally announce Haskell as yet another language we support. We've decided to put our focus on adding more functional languages, starting with Haskell, so you can expect more very soon.[](preview end) Right now, the Haskell repl has few limitations. In the repl, stdout won't be echoed until your program completes execution, and stdin is completely ignored. So if you want to use something like getLine , it's probably best to put that in the editor. Aside from that, it should behave eactly like ghci . You can give it a try right now at repl.it/languages/haskell . Let us know what you think. The Replit | Databricks integration gives…from repl.it
Does a similar job
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- 9H99 Haskell – Solve live Haskell coding problems in the browser2015 · 99haskell.org · ▲10
repl.it — A client-side web REPL for 15+ languages2011 · repl.it · ▲27Describe what you want. Replit builds it. Get a working app or website in minutes. No coding required.
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Hey HN, this is a small Haskell learning project that I wanted to share. It's just a website where you can see how many people write the exact same text as you (thought it was a fun idea). It's built using Scotty, SQLite, Redis and Caddy. Currently it's running in a small DigitalOcean droplet (1 Gb RAM). Using Haskell for web development (specifically with Scotty) was slightly easier than I thought, but still a relatively hard task compared to other languages. One of my main friction points was Haskell's multiple string-like types: String, Text (& lazy), ByteString (& lazy), and each library…
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