Why does Premiere Pro say "The file has an unsupported format or is damaged"?

This error occurs when an SRT file contains an invisible UTF-8 Byte Order Mark (BOM) on line 1, Windows CRLF line ending corruption, period millisecond delimiters instead of commas, or missing blank lines between subtitle blocks.

How do I fix the broken subtitle file in SubPreflight?

Drop your rejected file into the box above. SubPreflight detects the structural flaws in milliseconds and offers a 1-click "Apply Safe Auto-Repairs" button. Your dialogue stays untouched, and the repaired file imports into Premiere without error.

How do I fix the file manually without online tools?

Open the file in VS Code or an advanced text editor. Change the encoding from "UTF-8 with BOM" to standard "UTF-8", ensure line endings are set to LF instead of CRLF, and verify every timestamp uses commas before milliseconds (00:00:00,000).

Which subtitle formats does Adobe Premiere Pro support on caption tracks?

Adobe Premiere Pro natively supports SubRip (.srt), WebVTT (.vtt), MacCaption (.mcc), Scenarist Closed Caption (.scc), and EBU-STL (.stl). Standard SubRip (.srt) is the most reliable format for video editing.

.SRT.VTT

Premiere Pro Subtitle Import Repair

Fix damaged SRT files that Adobe Premiere Pro rejects with 'The file has an unsupported format or is damaged'. Strips UTF-8 BOM, fixes CRLF, and repairs timecode syntax.

100% In-Browser · Zero Upload

Zero latency · Client-side Web Worker

Drop your rejected subtitle file here to auto-repair

All structural repairs run client-side. Dialogue stays 100% untouched.

Why Adobe Premiere Pro Rejects Valid-Looking Subtitle Files

You exported an SRT file from an AI transcriber, freelance translator, or caption app. It opens in Windows Notepad and looks completely normal to your eyes. Yet the moment you drag it into Adobe Premiere Pro's Project panel, Premiere flashes an alert:

"Subtitle import failed: The file has an unsupported format or is damaged."

The Root Causes Diagnosed

1. Hidden UTF-8 BOM Marker

Windows Notepad secretly adds a 3-byte Byte Order Mark (\uFEFF) to line 1. Premiere's parser attempts to read the first cue number as an integer, crashes on the invisible character, and aborts import.

2. Period Millisecond Delimiters

SubRip standard requires commas before milliseconds (00:01:23,456). Many modern web converters accidentally output periods (00:01:23.456). Premiere's strict parser rejects period SRT files.

3. CRLF Line Ending Mismatch

Files edited on Windows use carriage returns (\r\n). When mixed with Unix linefeeds (\n), Premiere fails to detect the empty lines separating cues.

How to Import the Repaired File into Premiere Pro

Drop your file into the tool above and click Apply Safe Auto-Repairs.
Click Download Repaired .SRT.
Open Premiere Pro and drag the new .srt file directly into your Project panel.
Drag the caption asset from the Project panel onto your sequence timeline. Premiere will create a new Subtitle track with perfectly aligned dialogue.

Frequently Asked Questions

Why does Premiere Pro say "The file has an unsupported format or is damaged"?: This error occurs when an SRT file contains an invisible UTF-8 Byte Order Mark (BOM) on line 1, Windows CRLF line ending corruption, period millisecond delimiters instead of commas, or missing blank lines between subtitle blocks.
How do I fix the broken subtitle file in SubPreflight?: Drop your rejected file into the box above. SubPreflight detects the structural flaws in milliseconds and offers a 1-click "Apply Safe Auto-Repairs" button. Your dialogue stays untouched, and the repaired file imports into Premiere without error.
How do I fix the file manually without online tools?: Open the file in VS Code or an advanced text editor. Change the encoding from "UTF-8 with BOM" to standard "UTF-8", ensure line endings are set to LF instead of CRLF, and verify every timestamp uses commas before milliseconds (00:00:00,000).
Which subtitle formats does Adobe Premiere Pro support on caption tracks?: Adobe Premiere Pro natively supports SubRip (.srt), WebVTT (.vtt), MacCaption (.mcc), Scenarist Closed Caption (.scc), and EBU-STL (.stl). Standard SubRip (.srt) is the most reliable format for video editing.