Video Tools
Trim, compress, resize, and convert video formats without uploading.
Convert to MP4
Convert WebM videos to universal MP4 format right in your browser. Adjust quality settings while keeping your media completely private on your local device.
Open → MKV to MP4 ConverterConvert MKV videos to standard MP4 with H.264 encoding directly in your browser. Adjust quality settings without uploading your private files to any server.
Open → MOV to MP4 ConverterConvert QuickTime MOV videos to universal MP4 format right in your browser. Adjust quality and export H.264 files without uploading data to remote servers.
Open → AVI to MP4 ConverterConvert legacy AVI videos into universal MP4 files right in your browser. Re-encode video using H.264 compression without uploading files to any server.
Open → FLV to MP4 ConverterConvert legacy Flash FLV video files to modern MP4 format. Adjust video quality and resolution locally in your browser without uploading files to any server.
Open → 3GP to MP4 ConverterConvert old 3GP mobile videos to standard MP4 with H.264 and AAC audio. Customize resolution and quality directly in your browser without uploading files.
Open → MP4 Video ConverterConvert WebM, MKV, MOV, and AVI videos to H.264 MP4 directly in your browser. Adjust CRF quality and resolution with zero server uploads and complete privacy.
Open →Convert from MP4
Convert MP4 videos to WebM format directly in your browser. Adjust resolution and quality without uploading files to remote servers or losing your privacy.
Open → MP4 to MOV ConverterConvert MP4 videos to QuickTime MOV format directly in your browser. Adjust resolution and encoding quality while keeping your private files on your device.
Open → MP4 to MKV ConverterConvert MP4 videos to MKV containers right in your browser. Preserve multiple audio tracks and soft subtitles securely without uploading files to any server.
Open →Other conversions
Convert WebM videos to QuickTime MOV format directly in your browser. Transcode VP8 and VP9 clips for desktop editing software without uploading your files.
Open → WebM to MKV ConverterConvert WebM videos to MKV containers right inside your browser. Adjust resolution and quality settings locally without uploading private files to any server.
Open → MOV to WebM ConverterConvert QuickTime MOV videos to WebM format directly in your browser. Optimize video size and quality for HTML5 web playback without uploading your files.
Open → MOV to MKV ConverterConvert QuickTime MOV videos to open MKV containers right in your browser. Adjust quality and resolution while keeping media local and completely private.
Open → MKV to WebM ConverterConvert MKV videos to web-ready WebM format directly in your browser. Adjust quality and resolution settings privately without uploading files to any server.
Open → MKV to MOV ConverterConvert MKV recordings into QuickTime MOV files directly in your browser. Adjust resolution and encoding quality while your media stays strictly private.
Open → Video to WebM ConverterConvert any video file to the open WebM format directly in your browser. Slash file sizes for web delivery without uploading private video data to a server.
Open →Trim & crop
Trim video clips by selecting start and end timestamps. Choose instant stream copy or frame-accurate re-encoding with full privacy right inside your browser.
Open → Video CropperCrop video framing to remove black bars or change aspect ratio directly in your browser. Adjust crop boundaries locally with no uploads and zero data limits.
Open → Video Aspect Ratio ChangerChange video aspect ratios to 9:16, 1:1, or 16:9 by padding or cropping frames. Adjust dimensions directly in your browser without uploading to any server.
Open → Rotate VideoRotate videos 90, 180, or 270 degrees and flip horizontally or vertically. Changes are hard-coded into pixel data in your browser without uploading files.
Open →Speed & effects
Speed up or slow down video clips from 0.25x to 4x with synchronized audio pitch. All encoding happens directly in your browser without uploading files.
Open → Reverse VideoRewind and reverse video clips directly in your browser. Reverse the audio track or mute it entirely with no file uploads, watermarks, or quality loss.
Open → Video StabilizerStabilize shaky handheld video clips using in-browser motion analysis and cropping. Keep your raw footage private with local processing and no watermarks.
Open → Video Frame InterpolatorGenerate in-between frames to boost video frame rates and create smoother motion. Process clips directly in your browser without uploading to any server.
Open → Video FiltersAdjust video brightness, contrast, saturation, sharpness, and hue directly in your browser. Render locally without uploading files to an external server.
Open → Freeze Frame VideoFreeze any video frame for your chosen duration to highlight details or add emphasis. Adjust freeze timing with all processing kept secure in your browser.
Open →Audio & subtitles
Remove audio tracks from any video file without re-encoding. Maintain pristine video quality with instant in-browser stream copy and zero server uploads.
Open → Add Audio to VideoAdd music or voiceovers to your video, adjust track volume, or replace existing sound completely in your browser without uploading your files to any server.
Open → Burn Subtitles to VideoHardcode SRT subtitle tracks directly into video frames with custom styling. All processing runs privately in your browser without uploading video files.
Open →Frames & stills
Extract JPG frames from video files at custom frame intervals directly in your browser. Download full-resolution image sequences with zero server uploads.
Open → Video to PNGExtract lossless PNG frames directly from your video clips for precise analysis and editing. All processing runs privately in your browser without uploads.
Open → Video Frame GrabberCapture full-resolution still images from any video file directly in your browser. Select an exact timestamp, save as PNG or JPG, and keep your files private.
Open → Images to VideoTurn still photos into an MP4 video slideshow directly in your browser. Customise frame duration and resolution with zero server uploads and no watermark.
Open → Video to WebP ConverterConvert short video clips to animated WebP format directly in your browser. Create lightweight looping animations without uploading files to any remote server.
Open → Video to APNG ConverterConvert short video clips into lossless animated PNGs with full 24-bit color. Process files entirely in your browser without uploads or file size limits.
Open → Video to AVIF ConverterConvert short video clips into animated AVIF files for high-efficiency web graphics. Processing runs entirely in your browser without uploading your media.
Open →Compress & merge
Compress videos to a target file size or custom quality in your browser. Re-encode offline without uploading footage to external servers or losing privacy.
Open → Video ResizerChange video dimensions to 1080p, 720p, 480p, or custom pixel values directly in your browser. Lock aspect ratio to prevent stretching without uploading data.
Open → Video MergerCombine multiple video clips into a single file in your browser. Reorder tracks, match frame rates automatically, and merge footage without server uploads.
Open →Popular conversions
What you should know
Container formats like MKV, AVI, and FLV often fail to play natively across modern web browsers, operating systems, and social platforms that require standard H.264 or H.265 streams packaged inside MP4 containers. Beyond container mismatches, video delivery frequently runs into strict platform constraints: social feeds reject non-standard aspect ratios, messaging apps enforce rigid file size ceilings, and web development often demands animated WebP or AVIF files instead of bloated GIFs. Fixing minor issues like incorrect rotation metadata, out-of-sync audio, or redundant footage typically leaves you choosing between cumbersome desktop software installations and remote upload services that add watermarks.
The tools in this category handle format conversion, trimming, audio replacement, subtitle embedding, and frame extraction directly inside your browser. They run on a WebAssembly build of FFmpeg that downloads once, caches in your browser storage, and executes entirely within your system memory without transmitting your files to a server. Because the engine operates in a single browser thread without dedicated GPU hardware acceleration, transcoding long 4K footage takes noticeable time. For everyday 1080p clips, basic cuts, and format conversions, performance is bound entirely by your device CPU and available RAM.
Frequently asked questions
Why is there a short delay when opening a video tool for the first time?
The browser downloads a WebAssembly video engine of roughly 30 megabytes during your initial use. It remains stored in your local browser cache afterward, allowing subsequent visits to open immediately and function completely offline.
What is the maximum video file size I can edit or convert?
There is no artificial file size cap, but processing takes place directly in your device memory. Standard 1080p clips up to several hundred megabytes process reliably, while long 4K files may exceed your browser tab memory limits.
Why is browser video encoding slower than native desktop software?
WebAssembly runs inside a secure browser sandbox without direct access to hardware-accelerated GPU encoding chips. Processing speed relies strictly on your CPU, meaning longer files and higher resolutions scale rendering time accordingly.