Free tools from SteveShines
Media Doctor
Find out why a stream will not load, a video will not play or subtitles will not show. Each tool explains what it finds in plain language and runs entirely in your browser.
M3U8 Inspector
A stream will not load, or you need to know what an .m3u8 link contains.
- Master and media playlist structure
- Declared resolutions, bitrates and codecs
- Segment timing, live or VOD status
- Encryption and DRM signaling
Video Codec & Format Checker
A video will not play, plays without sound, or an app rejects it.
- Container, video and audio codecs
- Resolution, frame rate, duration and bitrate
- HEVC, AV1 and other compatibility risks
- Signs of an incomplete or damaged file
Subtitle Checker
Subtitles are out of sync, do not show up, or display strange characters.
- Timestamp syntax, order and overlaps
- Empty, duplicate and zero-length cues
- Encoding problems and unsafe markup
- Cleaned UTF-8 SRT or VTT download
Subtitle Shifter
Subtitles show up too early, too late, or drift further out of sync as the video plays.
- Shift every cue earlier or later
- Sync by the first and last line to fix drift
- Convert between 23.976, 24, 25 and 29.97 fps
- Synced UTF-8 SRT or VTT download
Video Size & Bitrate Calculator
A video is too large to send or upload, or you need the right bitrate for a size limit.
- File size from duration and bitrate
- Highest bitrate for a size limit
- Audio and container overhead included
- Typical bitrates for 480p to 4K
Subtitle to Text
You need the words of a video as text, without numbers, timestamps or tags.
- Removes numbers, timestamps and styling tags
- Joins lines into readable paragraphs
- Drops lines repeated back to back
- Copy or download as UTF-8 .txt
Aspect Ratio Calculator
You need a video in another shape, such as vertical 9:16 or square, or the right size for a ratio.
- Simplified ratio from width and height
- Resize while keeping the ratio
- Crop or pad to 16:9, 9:16, 1:1, 4:5 and more
- Even sizes ready for video encoders
Download Time Calculator
You want to know how long a video, movie or large file will take to download before you start.
- Time from file size and internet speed
- Size estimate from video length and quality
- Times at common speeds, 10 Mbps to 1 Gbps
- Realistic speed, not just the plan’s maximum
Video Frame Grabber
You need a still image from a video, such as a thumbnail, a screenshot or a single exact frame.
- Seek to an exact time or step frame by frame
- Full-resolution PNG or smaller JPG
- Several captures side by side
- Works with any video your browser can play
Windows apps from SteveShines
Windows apps for media work
When a diagnosis points to a fix, these apps handle it on your PC.
Direct Link Downloader
Save M3U8 and HLS streams as MP4 on Windows.
QuickMedia
Video downloader and local media toolkit.
FixVideo
Compress, convert to MP4 and fix playback errors.
Tapescript
Offline transcription for audio and video.
CreatorCut
Cut video, remove silence and add captions.
VidFetch
Paste a supported link and save the video locally.
Your files stay with you
Videos, playlists and subtitles are analyzed on your device. Nothing is uploaded to SteveShines, and no account is needed.
Declared versus verified
Each result separates what a file or playlist claims from what the tool actually checked, so you know how much to trust it.
Made by a Windows app publisher
SteveShines builds focused Windows apps. When a diagnosis points to a problem one of them handles, the result says so. Browse the apps