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Try It Online

Free plan APISelf-hostedWeb

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What Try It Online is

Try It Online (TIO) is a free family of online interpreters for practical and recreational programming languages. Users select a language, enter code and input, and run it in a sandboxed environment, with results returned to the browser. Client-side permalinks encode code and input in a URL for sharing runnable examples. TIO began as a place for Code Golf solutions and also supports trying and sharing snippets. The web app is ad-free, does not use tracking cookies or third-party analytics scripts, and works on mobile devices. Languages and features are added by request. TIO is open source under the MIT license and is available as a web app, API, or self-hosted instance. Setup instructions describe SELinux sandboxing on arena servers. The published Docker image disables SELinux and is intended only for offline use because exposing it to untrusted networks is unsafe. The Free plan costs nothing.

Who it suits

TIO suits programmers experimenting with languages, sharing snippets, or hosting Code Golf solutions. It also fits users needing an API or self-hosted interpreter service.

What it does well

  • Free web app
  • Client-side shareable permalinks
  • Ad-free with no tracking cookies
  • Open source under MIT license
  • Works on mobile devices

What to know first

  • Docker image is unsafe for exposed networks
  • Languages depend on requested additions
  • Self-hosting requires setup work
  • Sandbox deployment uses arena servers

Plans

PlanBilled and limitsPrice
FreeWeb app is free of chargeFree

As tio.run lists them, read 12 Oct 2026. The maker's own page has the final word.

Verdict

TIO offers browser-based code execution with shareable URLs and broad deployment options. Its offline-only Docker warning is important when considering self-hosting on a network.

Facts from Try It Online's own pages

API
TioTests documentation identifies a TIO backend URL with an API endpoint for running tests. · github.com, 12 Oct 2026
Audience
TIO began as a place to host solutions to Code Golf puzzles and can also be used to try and share code snippets. · github.com, 12 Oct 2026
Donations and infrastructure
The site describes donations to help cover server costs and says TIO is powered by DigitalOcean. · tio.run, 12 Oct 2026
Execution security
The setup documentation says user-supplied code runs on arena servers in a SELinux sandbox. · github.com, 12 Oct 2026
Free plan
Yes · tio.run, 22 Sept 2026
How it works
Users choose a language, enter code, and run it in a sandboxed environment; results are returned to the browser. · tio.run, 12 Oct 2026
Languages
The site says languages and features are added by request. · tio.run, 12 Oct 2026
Mobile
The site says TIO works well on mobile devices. · tio.run, 12 Oct 2026
Notable deployment limit
The maker says its Docker image disables SELinux and should only be used offline because exposing it to untrusted networks is unsafe. · github.com, 12 Oct 2026
Open source
The software that powers TIO is open source under the MIT license. · tio.run, 12 Oct 2026
Privacy
The web app is ad-free and does not use tracking cookies or third-party analytics scripts. · tio.run, 12 Oct 2026
Purpose
TIO is a family of online interpreters for practical and recreational programming languages. · tio.run, 12 Oct 2026
Self-hosting
The maker publishes setup instructions for running a new TIO instance. · github.com, 12 Oct 2026
Sharing controls
link_access · tio.run, 22 Sept 2026
Sharing
Users can create client-side permalinks that encode code and input in the URL. · tio.run, 12 Oct 2026
Support
Users can request features, report bugs, or ask questions through the listed community channels or by email. · tio.run, 12 Oct 2026

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