ultimaker/cura

3D printer / slicing GUI built on top of the Uranium framework

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Summary Information

Updated 55 minutes ago
Added to GitGenius on September 9th, 2026
Created on June 16th, 2014
Open Issues & Pull Requests: 3,446 (+0)
GitHub issues: Enabled
Number of forks: 2,177
Total Stargazers: 7,032 (+0)
Total Subscribers: 216 (+0)

Repository Insights (GitGenius)

Median issue/PR response: 5.9 hours
Mean response time: 28.8 days
90th percentile: 5.3 days
Tracked items: 2,303

How this project is maintained

Around half of the issues opened in the past year never receive a reply. 98% of open issues come from outside the core team, so the backlog reflects real-world use rather than internal planning. 77% of tracked open issues have had no activity in three months, so the open count overstates what is actively being worked. Only 6% of issues opened in the past year have been closed. Three people close 74% of everything that gets resolved.

Charts & Analytics

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Issue Activity (beta)

Open issues: 698
New in 7 days: 9
Closed in 7 days: 91
Avg open age: 651 days
Stale 30+ days: 672
Stale 90+ days: 633

Recent activity

Opened in 7 days: 8
Closed in 7 days: 88
Comments in 7 days: 4
Events in 7 days: 7

Top labels

  • Type: Bug (1,723)
  • Status: Triage (969)
  • Status: Needs Info (645)
  • Status: Under Investigation (448)
  • Slicing Error :collision: (351)
  • Status: Stale :hourglass: (351)
  • Type: Discussion (320)
  • Type: New Feature (285)

Most active issues this week

Detailed Description

Ultimaker Cura is a 3D printer slicing application that prepares 3D models for printing by converting them into machine-readable instructions.

The tool solves the problem of translating 3D models into printable G-code by providing a graphical interface built on the Uranium framework. It offers hundreds of configurable settings and relies on community-managed print profiles to optimize output for different printer models and materials. Users can adjust parameters visually before slicing, allowing fine-tuning of print quality, speed, and material usage.

Cura suits anyone with a 3D printer who needs to prepare models for printing, from hobbyists to professionals. The application's strength lies in its extensive library of community-contributed printer profiles, which means support for a wide range of hardware without requiring manual configuration. The README emphasizes community contribution pathways for both printer profiles and translations, indicating that the project welcomes and integrates user expertise.

Almost all open issues are raised by outside users rather than the core team, demonstrating a substantial base of active adopters reporting real-world problems. Maintainers typically respond to new issues and pull requests within a day. Work in the issue tracker is dominated by bug reports and triage activities, with many issues requiring additional information from reporters before resolution can proceed.