The two problems this solves
“The TV won’t play it.” Most failures are not the video at all but the sound: Samsung TVs have not decoded DTS since 2018, LG dropped it in 2020, Roku can’t decode Dolby Digital, cheap projectors have no Dolby licence. The picture plays, the sound is silent. Next come 10-bit video (HEVC Main 10, H.264 “Hi10P”), 4K or 60 fps on a 1080p box, and old XviD AVIs on new TVs.
“It doesn’t fit on the stick.” A season can be 30–60 GB and a single film 10–20 GB, while most sticks are FAT32 — which can’t hold any file over 4 GB.
How it works
- Choose the device. Type the model (UE55NU7100, OLED55C1, KD-55X85J, X96 Mini, HY300, Fire TV Stick…) — the year is read from the model code — or pick from 45+ profiles: TVs by brand and year, streaming sticks, Android TV boxes by chip, projectors, consoles, DVD players. Not listed? Paste the “supported formats” table from the manual and a profile is built from it.
- Drop your videos or a whole folder. Every file is checked against the device: video codec and bit depth, H.264 level, resolution and frame rate, each audio track, subtitles, size, file name.
- Set the stick and the sound. Stick size (8–256 GB) and format, audio language for the whole batch, stereo with clear dialogue, night mode, equal loudness, subtitles next to the file or burned in.
- Choose the stick (or a folder) and start. Files that already play are copied; files with the wrong sound get new sound only (the video is copied — fast); the rest are re-encoded to what the device handles.
What you get
- Sound that plays: DTS, TrueHD, Dolby Digital, Opus or FLAC become AAC stereo — or AC3 5.1 for devices that decode it.
- One language, first track: a single rule like “en, fr” for the whole batch. TVs usually play the first track and ignore “default”.
- It fits: the whole batch is sized to your stick at the same quality; on FAT32 every file stays under 4 GB — shrunk or split into parts.
- Tidy folders: “Show/Season 01/Show S01E02.mp4”, names safe for FAT32/exFAT, episodes in the right order.
- Long batches overnight: the screen is kept awake; if the tab closes, press “Continue” and finished files are skipped.
Questions
Is it free? Are my videos uploaded?
Free, no sign-up, no watermark, no size limit. Everything runs in your browser using your computer’s video hardware; files never leave your device. The site is supported by ads.
Which browser do I need?
Chrome, Edge or Opera on a Windows, Mac or Linux computer. Saving straight to a USB stick or folder needs one of these; other browsers save the files to your Downloads folder instead.
Why is there picture but no sound on my TV?
Almost always the audio track is DTS (or TrueHD/Dolby Digital on devices without the licence). CompressLab converts just the sound to AAC and copies the video, which takes a minute or two per episode.
Will the quality get worse?
Files that already play are copied untouched, and files that only need new sound keep the original video. Re-encoding happens only when the device can’t play the video — or when you ask to fit more on the stick.
What can’t it do?
Copy-protected discs and DRM files (Netflix, iTunes, Blu-ray) can’t be read by any browser tool. Picture subtitles (PGS/VobSub) can’t be turned into text. Very old formats (AVI/XviD, DTS) go through a slower path.
Last updated: 2026-10-30
See also
- Picture but no sound from USB? It’s the audio track
- Video over 4 GB won’t copy to the USB stick?
- Fit a whole season (or all your films) on one USB stick
- TV plays the wrong audio language? Keep only the right track
- HEVC 10-bit (x265) stutters or won’t play?
- Which video formats play from USB — device table