It changes the wrapper.
A file format is the way the same underlying media is packaged and encoded. Converting changes compatibility and storage behaviour more than it changes the subject itself.
Utilities & Security
Turn a timestamp into an actual date.
Paste a Unix timestamp, let OutMonkey detect seconds or milliseconds, and copy the readable local or UTC time.
1 Paste timestamp2 Check units3 Copy date
Readable time
Monday, September 28, 2026 at 11:41:26 PM UTC
UTC / ISO
2026-09-28T23:41:26.000Z
Unix timestamps do not contain a timezone. Local time uses this device's timezone; ISO is UTC.
What next?
Finish the next little job.
Useful to know
Four things worth knowing.
Conversion is not enhancement.
Conversion is not enhancement. Re-encoding a poor source cannot restore missing detail, and some formats lose transparency, animation or metadata.
Check what the format dropped.
Copy the result carefully and verify it before using it somewhere important.
Choose for what happens next.
Choose the format for what happens next: JPG for ordinary photos, PNG when transparency matters, WebP/AVIF for web delivery, and keep the source if you may edit again.