Freedom251 › Code Playground Software
Ideone
by Ideone
What Ideone is
Ideone is a web-based compiler and debugging tool for compiling and running code in more than 60 programming languages. Users select a language, enter source code and optional input, then execute it online. The editor includes syntax highlighting, templates, samples, notes, and stdin input. Programs may be public, secret, or private, though signing in is required for private visibility. The free plan is for non-commercial use; commercial use requires the operator’s consent and a separate contract, with fees and payment terms agreed individually. Ideone lists a 10-second compilation limit, 256 MB memory limit, and execution caps of 5 seconds for logged-out users or 15 seconds for registered users. Source code, input, and output each have a 64 kB limit, and programs cannot access the network. Ideone says its Sphere Engine technology runs programs remotely in a secure runtime environment. The site links to the Sphere Engine API and an IDE Widget for browser-based code execution. It supports public sharing but not deployment.
Who it suits
Ideone suits people who want to compile and run code in a browser, especially for non-commercial use. Its public, secret, and private visibility options offer ways to control program visibility.
What it does well
- Supports more than 60 programming languages.
- Editor offers syntax highlighting, templates, samples, and notes.
- Free plan is available for non-commercial use.
- Programs can be public, secret, or private.
- Links to an API and browser IDE Widget.
What to know first
- Commercial use requires consent and a separate contract.
- Programs cannot access the network.
- Source code, input, and output are each limited to 64 kB.
- Execution is limited to 5 or 15 seconds.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Non-commercial use | Free for non-commercial purposes | Free |
| Commercial use | Fees and payment terms are agreed individually · Requires operator consent and a separate contract | On request |
As ideone.com lists them, read 7 Oct 2026. The maker's own page has the final word.
Verdict
Ideone offers browser-based compilation with editor aids and several program visibility choices. Its runtime, file-size, and network restrictions matter, and commercial use requires operator approval.
Facts from Ideone's own pages
- API and embedding
- The site links to the Sphere Engine API and an IDE Widget for compiling and running code in a browser. · ideone.com, 7 Oct 2026
- Code execution
- Users can choose a programming language, enter source code and optional input data, and run it online. · ideone.com, 7 Oct 2026
- Code visibility
- Programs can be public, secret, or private; private visibility requires logging in. · ideone.com, 7 Oct 2026
- Editor features
- The code editor provides syntax highlighting, templates, samples, notes, and stdin input. · ideone.com, 7 Oct 2026
- Free plan
- Yes · ideone.com, 20 Sept 2026
- Headquarters
- Gdynia, Poland · ideone.com, 28 Sept 2026
- Maker
- Ideone’s terms identify Sphere Research Labs Sp. z o.o. as the service operator, registered in Gdynia, Poland. · ideone.com, 7 Oct 2026
- Other limits
- Source code, input, and output are each subject to a 64 kB size limit, and programs cannot access the network. · ideone.com, 7 Oct 2026
- Private projects
- Yes · ideone.com, 20 Sept 2026
- Purpose
- Ideone is an online compiler and debugging tool for compiling and executing source code in more than 60 programming languages. · ideone.com, 7 Oct 2026
- Runtime limits
- The FAQ lists a 10-second compilation limit, 256 MB memory limit, and execution limits of 5 seconds for logged-out users or 15 seconds for registered users. · ideone.com, 7 Oct 2026
- Security
- Ideone says its Sphere Engine technology runs programs on a remote server in a secure way within a complete runtime environment. · ideone.com, 7 Oct 2026
- Support
- The FAQ directs users to contact [email protected] for help with persistent internal errors and other inquiries. · ideone.com, 7 Oct 2026
- Terms of use
- Commercial use, including third-party brand promotion, corporate recruitment, or employee evaluation, requires the operator’s consent. · ideone.com, 7 Oct 2026
Where Ideone stands on Freedom251
- Code Playground Software#23 of 58
- Coding Playgrounds#102 of 138