Hextage

Hextage is a hex viewer and editor that reads any file as bytes. Open a photo, audio or video file and it reads as time too, so "which byte is this?" and "which second is this?" are always the same question.

View & Inspect

• Time column: every row of the dump shows the playback time of its bytes. In a multiplexed MP4 the video and audio rows alternate (marked with their own symbols), so you can see the interleaving.
• Timeline band: a waveform for anything with audio (WAV read directly, MP3 and video audio decoded), data rate for everything else. Click to jump, hover for the frame and time.
• Structure tree: boxes, chunks, markers and segments with names — ISOBMFF (MP4/MOV/HEIF/AVIF), RIFF (WAV/AVI), PNG/APNG, JPEG, GIF, TIFF, MP3 (ID3v1/v2), FLAC, AAC (ADTS), EBML (MKV/WebM), MPEG-TS, PDF.
• Metadata: Exif with GPS, ID3, QuickTime tags, RIFF INFO, PNG text — each one linked to the bytes it lives in.
• Reparse from here: read any position as a box, chunk, marker, frame or packet and see how the rest of the file would be read from there.
• Search: hex with wildcards (DE AD ?? EF), UTF-8 and UTF-16LE text, ASCII case-insensitive. Runs over multi-gigabyte files without loading them into memory.
• Jump, select by address or by time ("the first 3 seconds", "the last 10 seconds"), copy as hex, C, Swift, Python or ASCII.
• Player: a floating AVFoundation player linked both ways to the dump.

Edit

• Type over bytes in hex or ASCII, insert, delete, truncate, paste, write typed values (UInt32, Float …) in the current endianness.
• Cut the last N seconds, or remove only the media data and keep the index.
• Save in place, or export a modified copy while keeping the original.
• Edit history in its own window: position, before → after, timestamp; jump to any row or restore the file to that state.
• Bookmarks with notes that survive closing, follow insertions and deletions, and mark the bytes in the dump and the overview strip.
• Link two windows to scroll together, align them across insertions, and see every differing byte highlighted, with next/previous difference.
• Add a reparsed unit to the structure tree.

Hextage opens any file. Formats it does not know are shown as plain bytes with everything except structure and time.

The one-time in-app purchase "Hextage Pro" unlocks every feature without limits.