Introduction

What is Subtitle Remover?

Subtitle Remover is an AI tool that erases hard‑coded subtitles, captions, watermarks and on‑screen text from any video. Instead of covering text with a blur or a black bar, it uses a temporal inpainting model to rebuild the pixels that were behind the text, frame by frame, for a genuinely clean result.

It supports two modes:

• Auto — OCR automatically detects bottom‑screen subtitles and erases them in one click.
• Box select — you draw one or more rectangles over exactly what to remove (subtitles anywhere on screen, watermarks, logos, captions).

This guide walks through the Studio page, where the whole flow happens.

Quick start

1. Click Upload video on the home page (or open Studio from the top nav).
2. Pick a video file — mp4, flv, ts, avi, mov, wmv, mkv are supported, up to 1 GB.
3. The app uploads it directly to storage and shows an upload progress bar.
4. Choose Auto or Box select, then click Remove subtitles.
5. The task is queued and runs in the background — track it in History and download when it’s done.

The Studio page

The Studio is split into a left sidebar (mode + actions) and a right stage (your video).

1. Upload

You can start an upload two ways:

• From the home page — the Upload video button validates the file, requests a direct‑upload signature, and jumps straight to Studio with the upload already running.
• Inside Studio — click the upload area (or Upload another) to pick a file.

The file is uploaded directly from your browser to storage (no server round‑trip for the bytes). While it uploads, the stage shows a live upload progress bar. Your browser also computes the file’s MD5 and reads its duration / resolution so the job can be priced accurately.

Supported formats: mp4, flv, ts, avi, mov, wmv, mkv. Max size: 1 GB. Input can be up to 2K, but output is 1080p at most.

2. Choose a removal mode

Under Choose Type in the sidebar:

Auto

Best for standard bottom‑of‑frame subtitles. OCR finds the caption region automatically — you don’t draw anything. Just pick Auto and submit.

Box select

Best for text anywhere on screen, watermarks, or logos. Switch to Box select, then drag on the video to draw a red rectangle over the area you want erased.

• Draw multiple boxes — each covers a separate region.
• Hover a box and click the × to remove it.
• Boxes are stored as ratios relative to the frame, so they stay correct regardless of the player size.

You must draw at least one box in Box select mode before submitting (otherwise switch back to Auto).

3. Submit & processing

Click Remove subtitles. The request returns immediately — the task is queued on the server and runs asynchronously, so you can upload and submit another video right away without waiting.

While a task is processing, the stage shows a progress bar that estimates how far along it is, based on your video’s duration:

• Clips longer than 1 min — average RTF (processing time ÷ source duration) is 6–10. e.g. a 10‑minute video takes roughly 60–100 minutes.
• Clips shorter than 1 min — average RTF is about 25. e.g. a 30‑second video takes roughly 750 seconds (~12.5 minutes).

The progress bar is an estimate; the real result arrives when processing actually completes. You can leave the page — the task keeps running and stays in your History.

4. Preview, compare & download

While processing, the preview is not refreshed (it keeps showing your input). Only when the task succeeds does a before/after comparison appear:

• Drag the Compare slider between the original and the cleaned video.
• Switch between Input, Subtitles removed, and Compare views.
• Click Download to save the subtitle‑free 1080p MP4.

5. History

The History panel lists your previous submissions with their status — Processing, Done, or Failed. Finished jobs can be reopened to preview or download again.

Pricing & credits

Subtitle removal is billed by the second of video, by mode:

Credits are pre‑authorized when you submit and settled by the output duration. If a job fails on our side, the deducted credits are automatically refunded. Buy credits as one‑time packs or via a monthly subscription on the Pricing page.

Privacy

Uploaded and output videos are stored temporarily and auto‑deleted after 30 days. We do not use your videos to train models.