Free browser-based media tool
Explore tutorials, video compression guides, and technical insights on browser-based WebAssembly media processing.
Explore tutorials, video compression guides, and technical insights on browser-based WebAssembly media processing.
Lossy audio size is arithmetic: bitrate times duration. Lossless size depends on how compressible your recording is. Here are measured sizes for MP3, M4A, FLAC, Opus, WAV and AIFF from the same three-second source.
September 19, 2026
The two merge paths differ by two orders of magnitude. Copy-merge moves existing packets, re-encode decodes everything at once. We measured both across 20, 40 and 80 seconds of footage, plus the case that makes a merge fail outright.
September 19, 2026
GIF caps every frame at 256 colours, so gradients and dark scenes turn into bands — and the file still lands 20 to 30 times larger than an MP4 of the same clip. Here is what each setting actually costs, measured.
September 19, 2026
Fast trimming skips re-encoding, so it finishes almost quickly and leaves the picture untouched. It also runs a few frames past the mark you chose. We measured where those extra milliseconds come from and when they actually matter.
September 19, 2026
A practical comparison of WAV, FLAC and MP3 for editing, archiving and sharing, including where the quality is actually lost and when a conversion cannot help.
September 18, 2026
M4A voice memos and downloads are not always accepted everywhere. Here is how to convert them to MP3 in the browser, what quality to expect, and what the conversion costs.
September 18, 2026
A stream-copy join breaks when clips come from different phones, cameras or screen recorders. Here is how to spot the mismatch before you merge and which fix to apply.
September 18, 2026
Joining MP4 clips does not have to re-encode them. Here is when a stream-copy join works, which parameters have to match, and what to do when the clips differ.
September 18, 2026
Extract WAV audio from video for editing with HappyConvert. Learn when PCM WAV helps, how large files become, which time range to export, and what to verify.
August 1, 2026
Compress screen recordings without blurry text. Learn which HappyConvert resolution, quality, and speed settings protect code, menus, slides, and UI labels.
August 1, 2026
Reduce video resolution to 720p online with HappyConvert. Learn what 1280px width means, which quality preset to use, and how browser limits affect 4K files.
August 1, 2026
Convert MKV to MP4 for TV, phone, tablet, or browser playback. Choose H.264 and AAC in HappyConvert and avoid subtitle, audio, and codec surprises in practice.
August 1, 2026
Crop black bars from MP4, MOV, or WebM online. Identify letterboxing, calculate crop dimensions, avoid stretching, and export with HappyConvert.
July 31, 2026
Convert WebM to MP4 for iPhone and QuickTime with H.264 and AAC. Learn the right HappyConvert settings and fix common Apple playback failures.
July 31, 2026
Make a video smaller without wrecking the image. Learn what to trim first, when to lower resolution, and which HappyConvert settings to test before exporting.
July 30, 2026
MOV vs MP4 explained for iPhone videos, Windows sharing, editing, and web upload. Learn when to keep MOV and when to convert MOV to MP4 in the browser.
July 30, 2026
Extract audio from an MP4 video as MP3 or WAV in your browser. Learn which format to choose, when WAV is worth it, and why audio extraction is lighter than video conversion.
July 30, 2026
Turn a short video into a GIF online with practical FPS, width, and duration settings. Learn why short clips work better and how to avoid oversized GIF files.
July 30, 2026
Crop horizontal or square videos to 9:16 online. Learn what to keep in the safe area, how to avoid cutting faces or text, and when cropping is not enough.
July 29, 2026
Need to cut an MP4 quickly? Learn when lossless stream copy works, why cuts may land on keyframes, and how to use HappyConvert's video trimmer.
July 29, 2026
Need to send a video by email? Learn how to reduce file size with browser-side compression, what settings to try first, and when a link is better than an attachment.
July 29, 2026
Convert MP4 to WebM online when you need a browser-friendly web video. See the settings we use in HappyConvert, why WebM takes longer, and when MP4 is still better.
July 29, 2026
Learn how to easily compress large videos under Discord's 25MB limit without losing quality or getting watermarks using online smart CRF bitrate encoding.
July 8, 2026
Discover the technology behind WebAssembly media processing. See why local browser editing eliminates upload wait times and protects your private videos from cloud leaks.
July 5, 2026
Fix Apple QuickTime MOV video codec compatibility issues on Windows PC. Convert MOV to MP4 in your browser with no watermark, no upload step, and no cloud queue.
July 2, 2026
The ultimate guide to ripping background music, voice notes, and podcast audio from MP4, MOV, and WebM videos using browser WebAssembly without watermarks.
June 28, 2026