Privacy and Local Processing in Sublandia Editor

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Sublandia Editor is designed for a browser-based subtitle workflow where editing and project work happen locally on your device.

This means that using Sublandia Editor in a browser does not automatically mean that your video or subtitle files are uploaded to a cloud server for processing. The editor can run inside the browser while working with files on your own computer.

This is especially important for professional subtitle work, where projects may include confidential videos, client material, unreleased films, TV episodes, internal training videos, interviews, corporate content or sensitive translation files.

Local processing gives you more control over your files while you create, edit, check and export subtitles.

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Web Application Does Not Always Mean Cloud Processing

Many people assume that if a tool runs in a web browser, then the files must be uploaded online.

That is not always the case.

A web application can open in the browser and still process files locally on the user’s device. In this type of workflow, the browser acts as the working environment, while the video, subtitle and project data can remain on the computer during editing.

Sublandia Editor follows this browser-based local workflow for subtitle editing.

What Local Processing Means

Local processing means that the work happens on your device instead of relying on remote processing for the subtitle editing workflow.

In practice, this means that when you load a supported video file, import subtitles, edit timing, adjust text or prepare an export, the work is handled through the editor in your browser.

This approach is useful because it allows you to work with subtitle projects without treating every file as something that must be uploaded before you can edit it.

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Why Local Processing Matters for Subtitle Work

Subtitle projects often involve material that should not be shared unnecessarily.

This may include:

unreleased films
TV episodes
client videos
corporate training material
internal presentations
interview recordings
educational videos
translation files
confidential project files

For this type of work, local processing is a major advantage. It helps keep the workflow focused on your device and gives you more control over the files you are using.

Local Editing and Faster Workflow

Local processing is not only about privacy. It can also make the editing workflow feel more direct.

When subtitle editing, timing adjustments, waveform-based work and project changes happen locally, the editor can respond without requiring every change to be sent to a remote server first.

This is useful when you are making many small edits, such as adjusting subtitle timing, changing text, fixing line breaks or reviewing QC warnings.

A subtitle editor should feel immediate and precise. Local processing helps support that kind of workflow.

Working with Video Files Locally

Sublandia Editor supports MP4 video files.

When you load an MP4 video into a project, the video is used for subtitle editing and timing inside the browser. This allows you to work with the video while creating, importing, editing or reviewing subtitles.

Before starting a project, make sure the video file is the correct version and that it opens properly in Sublandia Editor.

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Working with Subtitle Files Locally

Sublandia Editor supports subtitle formats such as SRT, TTML, DFXP, VTT and ASS.

You can import supported subtitle files, edit them in the browser and export the final subtitle file when the work is ready.

This local workflow is useful because subtitle files can be reviewed, corrected and exported without turning the editing process into a cloud upload workflow.

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Project Files and Local Control

Sublandia Editor also supports .subpro project files.

A .subpro file is used to save and transfer full project data. Unlike a simple subtitle export, a project file can preserve broader project information connected to your work.

This is important because project backups give you more control. You can save your work, move it, reopen it later or keep a separate backup copy outside the browser environment.

Recommended guide pages:

Export and Import Subtitle Projects in Sublandia Editor

Local Processing Does Not Replace Backups

Even when files are processed locally, you should still back up important work.

Browser storage and local project data can be affected by browser settings, storage limits, clearing site data, changing devices or using a different browser.

For important projects, it is recommended to export both:

the final subtitle file, such as SRT, TTML, DFXP, VTT or ASS
the full project backup as a .subpro file

A subtitle export is usually the delivery file. A project backup helps you continue or restore your work later.

What You Should Still Be Careful About

Local processing gives you more control, but you should still follow a safe workflow.

Before working with important files, make sure you:

Use the correct video version.
Keep a backup of important source files.
Export the subtitle file after finishing work.
Save a .subpro project backup when needed.
Avoid clearing browser data before backing up your project.
Store confidential files in a safe location on your device.
Follow your client or company privacy requirements.

Privacy is not only a software feature. It is also part of how you manage your files.

Recommended Workflow for Private Projects

For confidential or client-sensitive projects, use this workflow:

Prepare the correct MP4 video file on your device.
Create or open the project in Sublandia Editor.
Import subtitles only from trusted files.
Edit subtitles locally in the browser.
Review timing, text and QC warnings.
Export the final subtitle file.
Export a .subpro backup if you need to preserve the full project.
Store exported files and backups in a secure location.

This helps keep your subtitle workflow organized, controlled and safer for professional use.

Related Guide Pages

FAQ

Does Sublandia Editor work in the browser?

Yes. Sublandia Editor is a browser-based subtitle editor.

Does browser-based mean cloud-based?

No. A browser-based tool does not automatically mean that files are processed in the cloud. Sublandia Editor is designed for a workflow where subtitle editing and project work happen locally on your device.

Are my video files uploaded when I edit subtitles?

Sublandia Editor is designed for local processing in the browser. This means the subtitle editing workflow can use files on your device without requiring the video to be uploaded for editing.

Why is local processing important?

Local processing is important because subtitle projects often include confidential or client-sensitive material. Keeping the workflow on your device gives you more control over your video, subtitle and project files.

Can I work with confidential client videos?

Sublandia Editor is designed to support a local browser-based workflow, which is useful for professional projects that require more control over files. You should still follow your client, company or project privacy requirements.

Does local processing make editing faster?

It can help the workflow feel more direct because subtitle changes, timing edits and project work do not need to be sent to a remote server for every action.

What video format does Sublandia Editor support?

Sublandia Editor supports MP4 video files.

Which subtitle formats does Sublandia Editor support?

Sublandia Editor supports SRT, TTML, DFXP, VTT and ASS for subtitle creation, import and export.

What is a .subpro file?

A .subpro file is a Sublandia Editor project file. It can save full project data so you can back up, transfer or continue your work later.

Does local processing mean I do not need backups?

No. Local processing does not replace backups. For important projects, you should export the final subtitle file and save a .subpro project backup.

What can cause local project data to be lost?

Local project data can be affected by clearing browser data, changing devices, using another browser, storage limits or browser settings. That is why project backups are important.

What should I do before closing the browser?

For important work, export the subtitle file and save a .subpro project backup before relying on the browser to keep your project available later.

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