On-device file converter running in WebAssembly.

15.3k stars 811 forks last commit first released AGPL-3.0

Actively maintained

Last commit 1 Jul 2026.

VERT screenshot

VERT is a file conversion utility that uses WebAssembly to convert files on your device instead of a cloud. Check out the live instance at vert.sh. VERT is built in Svelte and TypeScript.

Key Features

  • Convert files directly on your device using WebAssembly
  • No file size limits; supports 250+ formats
  • Convert images, audio, documents, and video
  • Conversion settings for format and quality control
  • User-friendly interface built with Svelte
  • Non-local video conversion is available via the official instance, while the daemon is easily self-hostable to maintain privacy and fully local functionality

Use Cases

  • Offline batch conversions on a workstation or local server
  • Self-hosted deployments using Docker for privacy and control
  • Integration into local, cloud-free workflows for sensitive data

Conclusion: VERT delivers offline, privacy-preserving file conversion with a modern UI and Docker-ready deployment, suitable for developers and power users who need local processing.

Categories:

Tags:

Tech Stack:

Share:

Similar to VERT

Haptic logo

Haptic

Local-first, privacy-focused open-source markdown note app

1.7k
54
Last commit

Minimal, local-first markdown note-taking app built with Svelte and Tailwind; provides desktop (Tauri) and web interfaces with local PGlite storage.

AGPL-3.0Slowing down
Alternative to:
Standard Notes logo
Standard Notes
+11
Perfice logo

Perfice

Local-first self-tracking platform with correlations and goals

458
25
Last commit

Perfice is a local-first self-tracking app (Svelte + TypeScript) to record arbitrary metrics, set goals, view correlations, export data, and optionally sync via a backend.

MITActively maintained
Alternative to:
Habitica logo
Habitica
+12
string.is logo

string.is

Open-source, privacy-friendly online string toolkit for developers.

306
20
Last commit

Privacy-first string toolkit with 50+ converters and formatters for developers.

AGPL-3.0Actively maintained
ActivityWatch logo

ActivityWatch

Privacy-first automated time tracker for desktop and mobile

18.4k
970
Last commit

Open-source, privacy-first automated time tracker with local storage, extensible watchers, and dashboards for analyzing app, browser, and coding activity.

MPL-2.0Actively maintained
Alternative to:
RescueTime logo
RescueTime
+6
MAZANOKE logo

MAZANOKE

Privacy-focused in-browser image optimizer for self-hosting

2.7k
136
Last commit

Self-hosted image optimizer that compresses and converts images locally in your browser, works offline, and keeps files private with on-device processing.

GPL-3.0Actively maintained
Alternative to:
Convertio logo
Convertio
+6

KaraKeep HomeDash

A privacy-first, in-browser dashboard for KaraKeep bookmarks.

137
4
Last commit

Compact, single-page dashboard that displays KaraKeep bookmarks organized by lists, running entirely in your browser with SQLite WASM.

GPL-3.0Slowing down
Alternative to:
Karakeep logo
Karakeep