Why this tool is useful
Create a predictable local schedule snapshot for migration, debugging or archive comparison without exposing confidential event contents to an online converter.
Local File Tools · runs locally
Private ICS Calendar to JSON Converter
Convert a saved iCalendar file into structured JSON containing calendar metadata, events, dates, attendees, categories, recurrence rules, alarms and attachments without uploading the schedule or requesting linked content.
Ready. Your working data stays in this browser.
Files and capture streams stay on this device. Processing uses browser APIs only; nothing is uploaded to YTSave, the media API or a proxy. No server copy is created, stored or left to delete. The file picker is cleared when processing starts, and disposable worker memory is destroyed after completion or cancellation. Preview and generated-output memory is released when you clear the tool or leave the page.
How it works
The browser maps bounded VCALENDAR and VEVENT properties into an explicit JSON schema, retains parameters such as TZID and CN, and rejects malformed component nesting.
Practical example
Convert a team calendar export to JSON, compare event UIDs in source control, and reuse the attendee and attachment arrays in a local migration script.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.