Free Online Subtitle Tools

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Powerful tools for syncing, converting, and perfecting subtitle files. No signup required100% free

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SUB/IDX to SRT

Convert image-based subtitles to editable text using OCR technology.

250k+ conversions Use Tool →

Subtitle Shifter

Adjust all subtitle timestamps forward or backward. Fix sync issues instantly.

180k+ uses Use Tool →

Convert to SRT

Convert any subtitle format to universal SRT. Supports all major formats.

150k+ uses Use Tool →

How It Works

1

Choose Tool

Select the tool you need from our collection

2

Upload File

Drag and drop or browse your subtitle file

3

Download Result

Get your processed file instantly

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Frequently Asked Questions

Is this tool really free?

Yes! All our tools are 100% free to use with no signup required.

Which subtitle formats are supported?

We support SRT, VTT, SUB, IDX, SUP, SSA, ASS, and many other popular subtitle formats.

Is my data safe and private?

Absolutely. All files are processed securely and automatically deleted after 1 hour.

How accurate is the OCR for SUB/IDX conversion?

Our OCR engine (Tesseract) provides high accuracy for most languages. Results depend on image quality and language complexity.

Everything You Need to Know About Subtitle Conversion

Subtitle conversion is an essential process for anyone working with video content. Our comprehensive suite of free online subtitle tools makes it easy to convert, sync, and perfect subtitles in any format.

What is a Subtitle Converter?

A subtitle converter transforms subtitle files from one format to another, supporting SRT, VTT, SUB/IDX, SUP, SSA/ASS, and more. Whether you're working with text-based subtitles or image-based formats, our tools handle all conversions seamlessly.

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Trusted by Subtitle Creators

“Fast conversion and a clean UI. Saves me time every week.”

— Amir, Fansub Editor

“SUP → SRT in minutes, tidy OCR output. Love it.”

— Hana, Translator

“All‑in‑one tools: shifter, cleaner, converter.”