Screen Recorder
Record your screen in the browser with optional system audio and microphone. Download WebM instantly — nothing uploaded.
Professional audio & video tools — process locally in your browser. No upload, no watermarks, large files supported, free to use.
All Tools
26 tools
Record your screen in the browser with optional system audio and microphone. Download WebM instantly — nothing uploaded.
Combine an external audio track with your video. Replace or mix original audio — fast, private processing in your browser.
Merge multiple videos (including TS segments) into one MP4 in the order you select.
Remove multiple sections from a video and export the remaining parts as one file.
Mark multiple time ranges to keep from one video and export them as a single merged file.
Reduce video file size with adjustable quality presets. Ideal for sharing and uploads.
Drag handles to crop your video frame, just like cropping a photo. Private in-browser processing.
Fix sideways phone footage or flip orientation. Rotate 90°, 180°, or mirror horizontally and vertically — export a corrected MP4 locally in your browser.
Speed up or slow down video for timelapse, slow motion, or tighter pacing. Adjust playback from 0.25× to 4× and export MP4 locally in your browser.
Boost quiet voiceovers and phone recordings, or tame hot background noise before posting. Pick a volume multiplier from mute to 4× and export MP4 locally in your browser.
Repeat one clip 2×–10× for signage, product demos, or social backgrounds. Export a single longer MP4 locally in your browser — short jobs finish fast, large outputs stream straight to disk.
Play a clip backwards for creative edits, reveal effects, or meme-style reversals. Export a reversed MP4 locally in your browser.
Resize videos for TikTok, YouTube Shorts, Instagram Reels, and more.
Convert videos to MP4 (H.264 + AAC) with Fast-Start for smooth web playback. Optional fast conversion without re-encoding for compatible files.
Extract audio from video and download as MP3. Works with most common video files.
Convert a video segment to GIF, animated WebP, or animated AVIF — entirely in your browser.
Capture a still frame from video, stitch multiple frames into one image, or export many frames as a ZIP. Processed in your browser.
Remove audio from any video online — get a silent MP4 or video-only file. Fast stream copy when possible; private processing in your browser.
Extract the original audio track without converting to MP3. Keeps the original encoding when possible.
Select a region on your video and blur it to cover logos or text. Processed in your browser — not AI inpainting.
Add text or image watermarks to your video at a position you choose. Processed locally on your device.
Convert TXT, VTT, ASS, SBV, or SRT subtitles to standard SRT format. Fast, private, in your browser.
Add subtitle tracks or burn subtitles into MP4 videos (supports TXT, SRT, VTT, ASS, and SBV).
Score your YouTube title for SEO — character count, keywords, and readability tips.
Upload your thumbnail and preview how it looks on the YouTube homepage, search results, and mobile feed.
Estimate YouTube ad revenue from views and RPM. Pick a niche or set a custom RPM — daily, monthly, and yearly ranges in seconds.
Why ALTools
Process large videos on your device without uploading. Big exports can stream straight to disk when your browser supports it.
No account required. Your media stays on your device — we never see your files.
Professional-grade tools, completely free, with no branding on exports.
ALTools processes video in your browser — files never leave your device. Learn why local processing matters for speed and privacy.
Read about in-browser video processingLearn
How It Works
Pick merge, extract MP3, compress, resize, or title optimizer from the grid.
Select your files. Everything is processed on your device for speed and privacy.
Get your output instantly — no queue, no email, no cloud storage.
Browse all tools or click Get Started. No sign-up, no watermarks — fast and private.
Get Started