iCalendar / JSON Converter

• Enter the displayed example values,or choose the local input files requested by the controls. Optional source files take precedence where labelled.
• Choose Convert calendar and inspect the complete result and any reported limitations.
• Use Download result and each companion download link to save complete outputs. Reset clears output and restores example controls.

Conversion: text-to-json
Source: BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//DTH//Local sample//EN
BEGIN:VEVENT
UID:sample@example.invalid
DTSTAMP:20261023T100000Z
DTSTART;VALUE=DATE:20261024
SUMMARY:Local example
END:VEVENT
END:VCALENDAR

• Convert one VCALENDAR2.0 with PRODID and nested components to/from the documented ordered JSON schema. Declared DATE/date-time,TZID,UTC and floating distinctions are indexed without validating or interpreting dates/recurrence. Complete ordered component/property/parameter JSON;raw escaped property values,groups,duplicate/unknown declarations and recurrence/timezone definitions are retained. Parameters use explicit name=values;quoted delimiters and RFC6868 caret escapes for iCalendar/vCard4 are supported. vCard3 parameters containing quotes/newlines refuse. No vCard2.1,legacy quoted-printable,unfolded base64 continuation or full RFC semantic/schema validity claim. One UTF-8 source up to1 MiB,20component levels/20,000entries/65,536characters per unfolded line/32parameters/100parameter values. Text output uses CRLF and≤75UTF-8-octet physical lines without splitting a Unicode code point. Main JSON10 MiB,content4 MiB,declaration companion10 MiB. No recurrence evaluation,timezone lookup,contact lookup or URI opening;all processing stays in your browser.
• Complete outputs only. Unsupported or oversized input is refused. Follow the displayed job-specific bounds and format policies.