Video tools

Convert, compress and edit video files. Everything runs locally in your browser.

📖 New to video? Read our Best Free Online Video Tools: The Complete Guide to Converting, Compressing and Editing Video for a full comparison of every tool below and which one to pick.

In-depth video guides

Resolution vs Bitrate: Which One Is Making Your Video Look Bad
Why a 4K file can look worse than a 720p one at the same size, what a bitrate actually buys, and how to tell which of the two is failing you.
Why Video Re-encoding Loses Quality (and When It Doesn't)
Some video edits are free and some cost quality every time. What re-encoding does to the frames, and how to tell which kind of edit you are about to make.

Convert 3GP to MP4
Convert old 3GP feature-phone videos to MP4 right in your browser. Free and private, with no upload, no size limit and no watermark.
Add Audio to Video
Add or replace a video's soundtrack with an audio file, right in your browser. Free and private, with no upload, no watermark and no server.
Add Subtitles to Video
Burn an SRT or VTT subtitle file into your video, right in your browser. Free and private hardcoded captions, with no upload and no watermark.
Audio Visualizer Video Maker
Turn audio into an MP4 with an animated waveform or spectrum over your own image or a solid color, free, in your browser, with no upload.
Convert AVI to MP4
Convert AVI videos to MP4 (H.264) directly in your browser. Free and private, with no upload, no size limit and no watermark.
Change Video Speed
Speed up or slow down MP4, MOV, M4V and WEBM in your browser. Five presets from 0.5x to 2x, audio pitch preserved, nothing ever uploaded.
Compress GIF
Shrink an animated GIF in your browser. Presets cut frame rate, width and palette size, and the tool never hands back a file bigger than your original.
Compress Video
Re-encode an MP4 with x264 in your browser using CRF presets tuned for email, WhatsApp and Discord. Free, private, no upload, no watermark, no sign-up.
Compress Video to a Target Size
Shrink a video to an exact file size (8MB, 10MB, 25MB, 50MB or custom) for Discord, email or upload limits. Runs in your browser, free and private.
Convert Video Frame Rate
Change a video's frame rate in your browser, from 60 down to 30, 25 or 24 fps for an editing timeline or a smaller file. Free, private, no upload.
Crop GIF
Crop an animated GIF in your browser with a visual selection box that trims every frame and keeps the loop. Free, private, no upload required.
Crop Video
Crop a video to 9:16, 1:1 or 16:9 in your browser and turn landscape footage vertical for Shorts, Reels and TikTok. Free, private, no upload.
Extract Subtitles from Video (MKV, MP4)
List every embedded subtitle track in an MKV or MP4 file, pick the ones you want, and save them as SRT or VTT. Runs entirely in your browser.
Extract Frames from Video
Pull still frames out of a video as JPG images in your browser, one every few seconds or a single frame at the timestamp you type. Free, no upload.
Flip / Mirror Video
Mirror a video left to right, or turn it upside down, in your browser. Fixes reversed selfie-camera footage in one pass, free and with no upload.
GIF Speed Changer
Retime an animated GIF from quarter speed to quadruple speed in your browser. The loop is preserved, nothing is uploaded, and there is no watermark.
Convert GIF to MP4
Turn animated GIFs into much smaller MP4 videos right in your browser. Free and private, no upload, no size limit and no watermark.
Make a GIF from Photos
Combine multiple photos into an animated, looping GIF right in your browser. Free and private, with delay, loop and size controls.
Loop Video & Boomerang Maker
Loop a clip several times or make a boomerang that plays forward then reversed, in your browser. The loop is a fast, lossless copy with no re-encode.
Merge Videos
Combine multiple video clips into one file right in your browser. Free and private, with automatic compatibility detection and re-encoding.
Convert MKV to MP4
Convert MKV videos to MP4 in your browser, free and private. Fast stream copy keeps original quality, with no upload, no size limit and no watermark.
Convert MOV to MP4
Convert iPhone and QuickTime MOV videos to MP4 right in your browser. Free and private, no upload, no size limit and no watermark.
MP3 to MP4 Video Converter
Pair an MP3, WAV, M4A, OGG or FLAC track with one still image or a solid color and get a 720p or 1080p MP4, built entirely on your own device.
Convert MP4 to GIF
Turn short MP4 clips into animated GIFs right in your browser. Free and private, with no upload, no watermark, plus frame rate and size controls.
Convert MP4 to WEBM
Re-encode an MP4 into WEBM with VP8 or VP9 video and Opus audio, on your own machine. No account, no watermark and no server round trip.
Convert MTS to MP4
Turn AVCHD camcorder MTS and M2TS clips into MP4. The default mode copies the streams over untouched, with an automatic re-encode when it cannot.
Remove Audio from Video
Strip the audio track out of a video in your browser. A stream copy mutes MP4, MOV, M4V and WEBM in seconds, with no upload and no watermark.
Resize Video for Social Media
Reframe a clip to 9:16, 1:1, 4:5 or 16:9 at 1080p or 720p, either cropping to fill the frame or padding it with bars. Nothing is uploaded.
Reverse a Video
Play a short clip backwards, with the audio reversed, kept forward or muted. Capped at 30 seconds and 100 MB because reversing holds every frame in memory.
Rotate Video
Fix a sideways clip by rewriting its rotation flag, which is instant and lossless, or bake the rotation into the pixels for stubborn players.
Screen Recorder
Record a tab, a window or your whole screen with optional microphone audio, straight from the browser. The file is written locally and never uploaded.
Shift Subtitle Timing (Fix Out-of-Sync Subtitles)
Move every subtitle cue earlier or later by a fixed number of seconds, and correct framerate drift with a stretch ratio. Format in equals format out.
Split Video
Split an MP4, MOV, M4V or WEBM into equal parts or fixed-length segments in your browser. Stream copy, so no re-encode and no quality loss. No upload.
Convert SRT to VTT
Convert subtitle files between SRT and WebVTT format in your browser, free, instant and private. Auto-detects direction from your file's extension.
Subtitle Editor (Create & Edit SRT/VTT Against Video)
Build or fix subtitles against real video playback. A cue table with tap-to-set timings, SRT and VTT import and export, all inside your browser.
Trim Video
Cut a video to a start and end time in your browser. A stream copy trims MP4, MOV, M4V and WEBM in seconds with no quality loss and no upload.
Video Converter
Drop a video, have its format detected for you, and convert to MP4, WebM or GIF entirely in your browser. Ten input formats accepted, nothing uploaded.
Video Info Viewer
Read a video's container, codec, resolution, frame rate, bitrate, rotation and audio details in your browser. Read only, nothing is uploaded or altered.
Video Volume Booster
Raise or lower a video's audio by a preset or a custom decibel figure, with an optional limiter. The picture is copied through untouched. No upload.
Add Watermark to Video
Overlay your own logo image or a text mark on a video, with a position, opacity and size you choose. Runs in your browser and adds no forced branding.
Convert WEBM to MP4
Convert WEBM videos and screen recordings to MP4 (H.264) in your browser. Free and private, no upload, no size limit, no watermark.

Video tools in action

Screenshot of the Trim Video tool with sysfenix-sample.webm (183 KB) loaded, Start time (seconds) set to 0, End time in seconds, where 0 means the end of the video set to 0 — Trim Video mid-process: sysfenix-sample.webm (183 KB) loaded, Start time (seconds) set to 0, End time in seconds, where 0 means the end of the video set to 0.

Screenshot of the Merge Videos tool with sysfenix-part-one.webm (183 KB) loaded — Merge Videos mid-process: sysfenix-part-one.webm (183 KB) loaded.