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Welcome to ALTools — Free Video Tools in Your Browser

Updated Jun 9, 2026

Meet ALTools: on-device video tools for compress, convert, resize, subtitles, YouTube helpers, and more — no uploads required.

ALTools is a free suite of video tools that runs entirely in your browser. You can merge clips, compress before upload, convert formats, resize for TikTok and Shorts, work with subtitles, and use YouTube planning helpers without installing desktop software or handing your files to a remote converter.

If you need a fast fix without opening a full editing app or waiting through an upload queue, that is where ALTools fits. This guide explains what the suite does well, who gets the most value from it, and why we chose a privacy-first browser workflow over the usual upload-first converter model.

Why we built browser-based video tools

Most online video sites still follow the same script: upload your file, wait in a queue, download the result, and trust the service to clean up your media afterward. That approach breaks down for:

Confidential footage - client reviews, unreleased products, personal family video
Large files - 4K screen recordings that crawl over limited upload bandwidth
Frequent edits - creators who need ten small fixes a day, not one heavyweight export session

Modern browsers can now handle serious video work locally—often using your CPU and GPU—without installing extra software. ALTools turns those capabilities into focused single-purpose tools: each page does one job well, and the tools chain together cleanly when you need a fast workflow.

What you can do today

Browse the full video tools suite, or jump straight to a few of the tools people use most:

Compress Video - export smaller MP4 files with quality presets and optional H.265
Merge Audio and Video - replace or mix in external audio tracks
Video to MP3 - extract audio for podcasts, voice tracks, or music beds
Social Media Resize - apply presets for TikTok, Shorts, Reels, and more
Trim Video and Extract Video Clips - do timeline edits without opening a full NLE
Screen Recorder - capture a tab, window, or full display locally

YouTube-focused utilities include Title Optimizer, Thumbnail Preview, Thumbnail Downloader, and Money Calculator.

Every live tool also links to step-by-step tutorials, so you can learn the workflow and jump straight back into the app.

Privacy and on-device processing

By on-device, we mean your video bytes are processed inside your browser tab with local compute. We do not run a cloud transcode farm that stores uploads for batch processing.

Benefits:

Benefit	What it means for you
Privacy	Sensitive media stays on your machine until you decide to share the export
Speed at small scale	No upload/download round trip for a 30-second fix
No account wall	Open a tool, use it, leave

There are still trade-offs: very large files are limited by browser memory, and encoding speed depends on your hardware, not a data-center GPU cluster. For many creators, that exchange is worth it.

Read more in our dedicated post: Why On-Device Video Processing Matters.

Who ALTools is for

Creators and marketers resizing clips for multiple platforms, compressing before YouTube upload, or mocking up thumbnails.

Educators and support teams recording quick screen demos, trimming mistakes, and sharing MP4 or GIF loops.

Developers and QA capturing repro steps, extracting streams, and converting containers without installing desktop tools or command-line utilities on your machine.

Privacy-conscious users who do not want to place client footage on random converter sites.

ALTools is not a replacement for DaVinci Resolve or Premiere for multi-track cinematic edits. It is the fastest path from "I have a video problem" to "I have a usable file I can ship."

How to get started in two minutes

Visit the homepage and choose a tool card, or open video tools for the full list.
Upload a file, or paste a URL where it applies (for YouTube tools).
Adjust the settings with the on-page hints. Quality presets, timelines, and platform sizes are labeled plainly.
Download the result. If you need another pass, keep your master file and avoid re-compressing already compressed exports.

For longer walkthroughs on compressing, trimming, converting to MP4, and more, head to the tutorials index.

Roadmap philosophy

We add tools when browser codecs and APIs make them reliable. Not every desktop feature belongs in a browser tab. Each tool ships with an SEO-friendly landing page, FAQs, and a tutorial, so you can learn the workflow without digging through forum threads.

If a page says live, it is ready for daily use. We also document limitations plainly. For example, watermark removal uses blur, not generative AI inpainting.