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Developer ToolsFree online tool
Open common developer text files in the browser so you can inspect their contents without installing a separate editor.
Paste or enter the data you want to process, then run the tool.
Use the controls above, check the result, then copy or download it when available.
No. It is intended to display file contents, not run arbitrary source code.
Use this tool whenever you need: Quickly reviewing Markdown, JSON, YAML, XML, HTML, CSS, JavaScript and TypeScript files. It offers a fast, client-side workflow without sign-ups, installation or complex software.
Yes. All processing executes locally in your browser using client-side JavaScript. Your inputs, files and calculations remain private and are never uploaded to our servers.
Use it for local inspection and avoid loading confidential source code when you are unsure how a file is handled. Important note: It is a viewer, not a complete IDE, parser or code-security scanner.
README preview
Turn Markdown into a readable document.
Any source file
Read common programming and config files quickly.
HTML preview
Preview a standalone HTML file safely.