Video format guides
Every one of these started as a real search. Each answers the question first, then shows you the fastest way to fix it - in this browser or in the app.
When a video will not play
Why your MOV file won't play on Windows (and how to fix it)
They double-clicked a .mov — usually one someone AirDropped or emailed them from an iPhone — and got a black screen, an error, or audio with no picture. Every page they have opened tells them to install VLC or buy a codec, and they do not want to install anything on this machine.
Read the guide →Why iPhone videos won't play on Android phones
Someone sent them a video from an iPhone and their Android gallery shows a grey thumbnail or an error. Half the pages they find blame resolution or frame rate, which is wrong and wastes their time.
Read the guide →HEVC video won't play on Windows 11: the permanent fix
They have H.265 footage from a phone, drone or action camera, and Windows either refuses it or plays audio over a black screen. The results all push Microsoft's paid HEVC Video Extensions or a codec pack, which fixes one PC and nothing else.
Read the guide →Video plays but there's no sound: fixing an unsupported audio codec
The picture is fine, the sound is silent, and every result tells them to install AC3Filter, a codec pack, or VLC. Nobody offers a fix for the file itself, so the problem follows the file to the next device.
Read the guide →DaVinci Resolve imports MP4 as audio only: why, and the fix
The clip drops into the media pool as a waveform with no picture. Forum threads take twenty replies to establish what is actually inside the file, and the answers end at 'install HandBrake' or 'buy Resolve Studio'.
Read the guide →Premiere Pro won't import MKV — remux it, don't re-encode it
An editor has OBS or downloaded footage in MKV and Premiere refuses it. The consensus advice is to run it through HandBrake, which re-encodes and costs a generation of quality before the edit even starts, or to rename the extension, which is actively dangerous.
Read the guide →CapCut says 'file not supported': what's actually wrong
They are mid-edit on a phone with an error message in hand. CapCut's own help page admits the trap but does not solve it, and the rest of the SERP is scraped listicles.
Read the guide →On your phone, Mac or PC
How to convert MOV to MP4 on Windows 11 without installing software
They are stuck right now with a MOV on a Windows 11 PC, and the entire page-one answer set is 'download this .exe' — VLC, HandBrake, WonderFox, VideoProc. Several of them cannot install software on that machine at all.
Read the guide →How to convert MOV to MP4 on an iPhone without a computer
They have explicitly ruled out a desktop. Blog results push whichever app pays, App Store listings are injected straight into the SERP, and nobody tells them the useful fact that the conversion they need is usually only a container swap.
Read the guide →How to convert video on a Chromebook
A Chromebook owner, often a student on a school-managed device, is being told by half of page one to download Windows .exe converters they physically cannot run, and by the other half to use an editor that wants an account.
Read the guide →HandBrake alternatives that need no install
They want HandBrake's job done somewhere HandBrake cannot go: a work laptop with locked-down installs, a Chromebook, or a phone. Every listicle answers with yet another desktop installer.
Read the guide →Privacy and online converters
Are online video converters safe?
They are about to upload something personal — a family video, client footage, surveillance clip — to a site they found five minutes ago, and warnings about malicious converter sites have made them hesitate.
Read the guide →CloudConvert alternatives that don't upload your file
They hit a daily quota, a file size ceiling, or a moment of doubt mid-conversion, and want to know what else does the job. The results are directories and rival converters grading themselves.
Read the guide →Do online converters keep your files? A side-by-side comparison
They want a straight answer about what happens to an uploaded video afterwards, and Google is stitching one together from four different vendors' policy pages plus privacy-vendor blog posts.
Read the guide →Getting a video into an app
How to convert a video so WhatsApp will send and play it
A video refuses to send, or sends as a document that the recipient cannot open. Every ranking page is a Windows shareware pitch, several quote file-size numbers that are years out of date, and none of them converts anything.
Read the guide →How to send a large video on Discord without Nitro
Their clip is rejected, or it uploads and shows as a dead file instead of playing. Every ranking page states a different, wrong upload limit — 8MB, 10MB or 25MB — so they cannot even tell what target they are aiming at.
Read the guide →Video too large to email? How to get under the attachment limit
An attachment bounced or was silently converted into a Drive link the recipient cannot open. They want the file to arrive as a file, and they do not want to put a work video on a random website to get there.
Read the guide →What video format works on a USB car stereo
They copied a film onto a USB stick, plugged it into the car, and the head unit either ignores the file or shows an unsupported-format message. No major site owns this query, so they are reading a decade-old affiliate page.
Read the guide →Getting an MKV to play on a smart TV from USB
They put a movie on a USB stick, the TV either skips the file or plays the picture with a 'sound format not supported' banner, and the only pages that come up are ad-heavy affiliate posts from a decade ago.
Read the guide →'PowerPoint cannot play media': how to fix the video in your deck
A deck is due, the video shows a black rectangle in the conference room, and the fixes on offer are Optimize Compatibility (which frequently fails) or installing K-Lite on a machine where they have no admin rights.
Read the guide →Quality and file size
How to convert MKV to MP4 without losing any quality
They have a movie or a recording in MKV, they need MP4, and they have been told by every vendor blog to run it through HandBrake or a paid desktop app — both of which re-encode and lose quality by definition.
Read the guide →Does converting MOV to MP4 lose quality? Only if you re-encode
They care about the footage — a wedding clip, a client shoot, a memory — and every tool they have found hedges with 'quality loss is practically negligible', which is not the same as none.
Read the guide →Audio drifting out of sync? Convert variable frame rate to constant
A clip is in sync at the start and seconds off by the end, and only after it has been edited. Adobe forum threads diagnose it correctly but nobody offers a fix that does not involve buying something.
Read the guide →Formats and codecs
Or just convert it now
Every converter below runs in this tab. Nothing is uploaded.
MOV to MP4
Convert MOV to MP4 free in your browser.
Open the converter →MKV to MP4
Convert MKV to MP4 free in your browser, with no upload and no daily limit.
Open the converter →AVI to MP4
Convert AVI to MP4 free in your browser with real quality control.
Open the converter →WebM to MP4
Convert WebM to MP4 free in your browser.
Open the converter →MP4 to MOV
Convert MP4 to MOV free in your browser for QuickTime, iMovie and Final Cut.
Open the converter →HEVC to H.264
Convert HEVC (H.265) video to H.264 MP4 free in your browser, nothing uploaded.
Open the converter →TS & MTS to MP4
Convert TS, MTS and M2TS to MP4 free in your browser.
Open the converter →