Online JSON to iCalendar Converter
Easily convert JSON to ICS/iCalendar. Fast, accurate JSON to ICS conversions with our free tool, perfect for streamlined calendar integration.
Use this focused converter when you need a direct JSON to iCalendar export without moving data through a server.
Conversion focus
Private by design: JSON content is processed locally in the browser.
Need Custom Conversion?Drop a file here, or click to browse
Max 25 MB. Loads into the same editor as the Text tab; use Convert below.
Map each ICS field to a normalized table column. Use Include to choose output lines; Check all / Uncheck all sit under the mapping table.
| # | ICS Field | Mapping | Include |
|---|---|---|---|
| Provide input above to load mapping options. | |||
Column names and types feed SQL generation (same rules as the CSV tool).
| # | Field Name | Data Type | Max Size | Key | Include | Trim | NULL empty |
|---|---|---|---|---|---|---|---|
| Provide input to load columns. | |||||||
What this conversion is for
Shape JSON rows into VEVENT blocks with DTSTART, DTEND, SUMMARY, LOCATION, and UID so calendar apps can import real meetings and reminders.
- Each JSON row typically maps to one VEVENT—SUMMARY and DTSTART are the usual required pair.
- Time zones: prefer explicit offsets or UTC markers so Outlook/Google interpret starts correctly.
- UID stability matters if you re-import the same logical event later.
Calendar events: DTSTART, SUMMARY, LOCATION
- DTSTART (and DTEND) define when the event occurs—UTC Z, offsets, or floating local times per ICS rules.
- SUMMARY is the headline attendees see; LOCATION and DESCRIPTION add venue and agenda text.
- UID must stay stable across edits so calendar apps update instead of duplicating events.
- RRULE and timezone quirks may simplify—validate imports in a test mailbox first.
Use this output next
Automation and APIs.
Printable calendars.
Timeline review in Excel.
Edit events in a spreadsheet.
Suggested workflow
Paste JSON in the Text tab or upload a file; use Format when it helps.
Confirm the document parses—objects, arrays, and string quoting must be valid JSON.
Map columns or properties to SUMMARY/DTSTART or FN/TEL—required fields must be non-empty for imports.
Download .ics for calendar apps; verify time zones before bulk send.
Before you convert
- JSON must be valid: duplicate keys, trailing commas, or BOMs break parsers.
- UID stability matters on re-import—do not shuffle identifiers between runs.
- Keep a copy of the original JSON as the audit trail after you ship iCalendar.
Choose the right output
When to use iCalendar
- Calendar clients expect .ics with VEVENT blocks—not JSON in email.
- Marketing or ops JSON feeds must become meeting invites or room holds.
- You need SUMMARY, DTSTART, and LOCATION surfaced for attendee mailboxes.
- Static schedules are being distributed outside your web app.
When not to use iCalendar
- Editable schedules belong in XLSX/CSV before you freeze calendar files.
- API-driven scheduling should use JSON feeds, not static ICS alone.
- Printable rooming charts may be better as PDF than calendar invites.
- Complex recurrence editing is safer in a calendar UI than CSV round-trips.
Why use ConversionTab?
- Runs in your browser — privacy-first; sensitive JSON stays on your device until you copy or download.
- No uploads required — paste or pick a local file; nothing is sent to a conversion backend for the transform itself.
- Fast and secure — lightweight mapping UI with immediate preview for developer workflows.
- Built for everyone — clear steps for non-technical reviewers and power options for engineers.
Continue with other formats
Flat pipelines and spreadsheet handoffs instead of ICS.
Contact bundles for phones and mail instead of ICS.
Repo-native config and CI matrices instead of ICS.
Typed spreadsheet review instead of ICS.
Executable load scripts instead of ICS.
Reviewed JSON → iCalendar notes
Long-form FAQs live below—expand a section when you need edge cases or field rules.
- Step 1: Input JSON Data: Begin by providing your JSON data into the designated area. You can either input JSON data directly as text or upload a JSON file.
- Step 2: Map JSON Properties: Proceed to the 'Output Options' section to map JSON properties to ICS fields. Ensure accurate mapping for proper representation of event details.
- Step 3: Configure Recurring Events: If your JSON data includes recurring events, configure recurrence settings such as interval-based recurrence or custom recurrence rules using the iCalendar RRULE syntax.
- Step 4: Initiate Conversion: Click the 'Convert' button to begin the conversion process.
- Step 5: Review Output: Once the conversion is complete, review the resulting ICS data. You can either copy the data or download the ICS file for further usage.
- Step 6: Explore Additional Features: Utilize any additional features provided by the tool, such as accessing example JSON data for demonstration purposes and resetting input/output data as required.
The JSON to iCalendar Converter helps you transform JSON into iCalendar effortlessly, designed for calendar events.
Perfect for event sharing, this tool ensures secure, fast, and precise results for cross-platform scheduling.
You can either paste your JSON data directly into the input field or upload a file. Select iCalendar as the desired output format, and the converted file will be ready in moments.
Your converted iCalendar file is ready to download. Simply save it to your device.
1. How does the JSON to ICS conversion work on ConversionTab?
The JSON to ICS conversion feature on ConversionTab allows users to convert JSON data into ICS (iCalendar) format, commonly used for event scheduling and calendaring purposes.
2. What are the input options for JSON data?
ConversionTab provides users with two input options for JSON data:
- Text Tab: Users can manually input JSON data as a valid string in this tab.
- File Tab: Users can upload their JSON file through the 'Drop/Browse File' feature, simplifying the process for working with existing data.
3. What happens after entering JSON data?
Upon entering JSON data, users proceed to the 'Output Options' section, where they can customize various parameters before generating the ICS file.
4. What are the key considerations for customizing event details?
Customizing event details involves mapping JSON properties to corresponding ICS fields. Key considerations include:
- Title: Assign the JSON property containing event titles to the appropriate ICS field.
- Date and Time: Map properties representing event start and end dates and times to corresponding ICS fields.
- Description: Assign JSON properties containing event descriptions to the ICS description field.
- Location: Map the JSON location data to the ICS location field for precise event venue information.
These mappings ensure accurate representation of event information in the resulting ICS file.
5. What is the 'Include' option?
The 'Include' option allows users to specify which event details should be included or excluded in the resulting ICS file. By toggling checkboxes, users can control the content of the generated ICS file based on their preferences.
6. How are recurring events handled?
ConversionTab handles recurring events seamlessly by default. Users do not need to adjust settings for recurring events; the standard format is automatically selected, ensuring accurate representation in the ICS format.
7. How do I obtain the ICS output?
Once customization is complete, users can initiate the conversion process by clicking the 'Convert' button. The resulting ICS data is displayed in a textarea, providing options to:
- Copy: Users can copy the generated ICS data for immediate use.
- Download: Users can download the ICS file, with the option to specify a custom filename if desired.
This flexibility ensures convenient access to converted data in the preferred format.
8. Is there an example JSON and a way to reset the input/output data?
To aid user understanding and facilitate reset functionality, ConversionTab offers:
- Example JSON: Users can access a sample JSON by clicking the 'Example' button, populating the text area with sample data for easier comprehension of the conversion process.
- Reset Functionality: The 'Clear' button allows users to clear input and output data, providing a clean slate for new conversions or adjustments.
JSON is parsed as structured input for this page. Use complete rows, valid syntax, and consistent field names so the converter can preserve the important data when creating iCalendar.
iCalendar is generated from the parsed JSON data. Review the output before importing it into another system, especially when the destination expects strict columns, dates, or contact fields.
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