Convert Date Formats in a Column
DD.MM.YYYY, MM/DD/YYYY, Excel serial numbers … → ISO or any pattern.
| id | Date |
|---|---|
| 1 | 2025-12-31 |
| 2 | 2026-01-15 |
| 3 | 2026-04-03 |
| 4 | 2026-01-01 |
| 5 | 2026-03-07 |
| 6 | 2026-03-09 |
| 7 | soon |
Runs entirely in your browser. Nothing is sent anywhere.
How it works
- 1Paste or type your text.
- 2Choose the options you need.
- 3Copy or download the result.
About this tool
Convert Date Formats in a Column: DD.MM.YYYY, MM/DD/YYYY, Excel serial numbers … → ISO or any pattern. Paste your text and the result appears immediately, ready to copy or download. Everything happens locally in your browser — nothing you paste is uploaded or stored.
Example
Input
id,date 1,31.12.2025 2,2026-01-15 3,03/04/2026 4,46023 5,7 Mar 2026 6,"March 9, 2026" 7,soon
Output
id,date 1,2025-12-31 2,2026-01-15 3,2026-04-03 4,2026-01-01 5,2026-03-07 6,2026-03-09 7,soon
How do I use the Convert Date Formats in a Column?
Paste or type your text. Choose the options you need. Copy or download the result.
Is the Convert Date Formats in a Column free?
Yes. It is completely free with no sign-up, no usage limits and no watermark.
Is my data sent to a server?
No. Everything is calculated locally in your browser. Nothing you enter is uploaded, logged or stored.
Does it work on my phone?
Yes. It works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux — no app needed.