Firefox Browser Add-ons
  • Extensions
  • Themes
    • for Firefox
    • Dictionaries & Language Packs
    • Other Browser Sites
    • Add-ons for Android
Log in
Preview of NexVid - Real-time Video Upscaler & Enhancer

NexVid - Real-time Video Upscaler & Enhancer by Sylphe

NexVid is a lightweight browser extension that improves the visual quality of video content in real time. NexVid enhances anime, animation and other video sources directly in your browser.

4.4 (8 reviews)4.4 (8 reviews)
409 Users409 Users
Download Firefox and get the extension
Download file

Extension Metadata

Screenshots
Preview upscaling filtersMany shaders to exploreSeveral filters to fine tune the videoSave your presets and filter websitesLocal video player with upscaler and shaders
About this extension
🎬 NexVid is a lightweight browser extension for real-time video upscaling and creative enhancement. It uses GPU-accelerated Anime4K processing, advanced filters, and a large library of WebGL shaders to improve anime, cartoons, movies, music videos, and other web video directly in your browser. Choose from 15+ Anime4K upscaling quality profiles, tune the target FPS for your hardware, set a resolution threshold to avoid processing already high-resolution sources, and build your own enhancement stack without uploading media anywhere.

Features:
  • Real-time upscaling with profiles ranging from fastest to maximum quality.
  • Performance controls including target FPS tuning and automatic resolution threshold handling - works great even on less powerful computers thanks to adjustable filters and profiles.
  • 30+ WebGL shaders across retro, glow, glitch, chromatic, artistic, anime-focused, and experimental super-resolution categories.
  • Advanced filters and image controls including brightness, saturation, contrast, grayscale, sepia, hue rotation, blur, gamma, emboss, morphology, unsharp mask, and high-pass sharpening.
  • Adjustable shader parameters plus preset saving and loading for complete effect chains.
  • Built-in local video player to apply upscaling, filters, and shaders to local video files.
  • Interface available in English, French, Spanish, Russian, and Simplified Chinese.
  • Privacy-friendly processing performed locally in the browser. 🔒
  • Upscale and Export a video from your local computer

Ideal for users who want sharper lines, cleaner details, and more stylized playback without leaving the browser.

Our extension provides occasional, non-invasive ads within the extension interface, including in the popup and/or other internal extension pages to keep the service free for our users.

Video Demonstration
Developer comments
Have a feedback or bug to report ?
Contact me at betrmps.maxime+nexvid@gmail.com
Rated 4.4 by 8 reviewers
Log in to rate this extension
There are no ratings yet

Star rating saved

5
6
4
1
3
0
2
0
1
1
Read all 8 reviews
Permissions and data

Required permissions:

  • Access your data for all web sites
Learn more
More information
Add-on Links
  • Support site
  • Support Email
  • Copy add-on ID
Version
1.1.8
Size
1.04 MB
Last updated
7 days ago (15 May 2026)
Related Categories
  • Appearance
  • Photos, Music & Videos
  • Games & Entertainment
Licence
All Rights Reserved
Version History
  • See all versions
Tags
  • dailymotion
  • reddit
  • streaming
  • twitch
  • video converter
  • video downloader
  • youtube
Add to collection
Report this add-on
Go to Mozilla's homepage

Add-ons

  • About
  • Firefox Add-ons Blog
  • Extension Workshop
  • Developer Hub
  • Developer Policies
  • Community Blog
  • Forum
  • Report a bug
  • Review Guide

Browsers

  • Desktop
  • Mobile
  • Enterprise

Products

  • Browsers
  • VPN
  • Relay
  • Monitor
  • Pocket
  • Bluesky (@firefox.com)
  • Instagram (Firefox)
  • YouTube (firefoxchannel)
  • Privacy
  • Cookies
  • Legal

Except where otherwise noted, content on this site is licensed under the Creative Commons Attribution Share-Alike Licence v3.0 or any later version.