Files, Binary & Compression
Open a file to browse its bytes, or switch to Paste hex dump to turn xxd or hexdump -C output back into a file.
example-1x1.png
70 bytes (0x46)
Drop a file here, or use Open file.
Files are read locally in your browser, a small window at a time; nothing is uploaded.
Click a byte to move the cursor. Shift+click or Shift+arrow keys extend the selection; PageUp, PageDown, Home and End work inside the view.
example-1x1.png: 70 bytes.
A hex viewer is what you open when a file will not tell you what it is: a download that refuses to install, a config blob an app wrote, a firmware image, a PNG that no program wants to display. The offset column tells you where you are, the hex column shows each byte exactly, and the ASCII column makes any readable strings jump out.
You could run xxd or hexdump -C in a terminal, and this hex viewer prints exactly the same layout so you can compare the two line by line. What the terminal does not give you is a cursor: click a byte and the inspector reads the integer or float that starts there in little- or big-endian, and the same page can take a dump someone pasted into a ticket and hand you the original binary back.
It reads like the terminal, but you can point at a byte and ask what it means.
Only the sixteen rows on screen, plus the eight bytes under the cursor, are ever read from disk. A 3 GB disk image scrolls as smoothly as a 3 KB icon, and nothing is truncated to the first megabyte.
Paste xxd or hexdump -C output, including the * lines hexdump uses for repeated rows, and download the bytes as a .bin. A line with a gap in its offsets is reported with its line number instead of being filled with zeros.
The inspector reads the bytes at the cursor as 8- to 64-bit integers and 32- or 64-bit floats. Switch between little- and big-endian and you see how the same four bytes turn into two very different numbers.
Drop a file onto the input or use Open file; the view appears immediately and never loads the whole file. Paste hex dump takes xxd, hexdump -C, plain hex or a C array and converts it 350 ms after you stop typing.
Click a byte, then use the arrow keys, PageUp and PageDown. Ctrl/Cmd+Home and Ctrl/Cmd+End go to the first and last byte. Jump to offset accepts 0x1A0, 1A0h or plain decimal 416.
Shift+click, or type a range start and length, to select bytes, then pick an export format. The offset column in hexdump -C and xxd output keeps the real file offsets, so the exported slice still lines up with the original file.
Lowercase hex, an extra gap after the eighth byte, non-printable bytes shown as a dot, and 8, 16 or 32 bytes per row. Zero bytes are dimmed so padding is easy to skip.
Search a hex sequence or a UTF-8 string across the whole file in a background worker, with a progress bar, a match counter and previous and next buttons. Matches that span a chunk boundary are still found.
Signed and unsigned 8-, 16-, 32- and 64-bit integers, float32, float64, the bits of the current byte and the UTF-8 character starting there, all read from the cursor position.
Copy or download a selection as hexdump -C, xxd, plain hex in the xxd -p layout, or a C array like xxd -i produces, or save the raw bytes as a .bin.
Open this hex viewer in any browser and drop the file onto it. The file is read locally by the browser itself, so nothing is installed and nothing leaves your computer.
Switch to Paste hex dump, paste the xxd, hexdump -C or plain hex text, and choose Download whole file (.bin). It is the browser equivalent of xxd -r, except that missing lines are reported instead of silently filled with zeros.
Yes, up to 4 GiB. The hex viewer only reads the rows currently on screen, so opening a large file is as fast as opening a small one. Searching a large file does read all of it, in 1 MiB chunks with a progress bar you can cancel.
The first bytes at offset 00000000 are the signature: 89 50 4E 47 is PNG, FF D8 FF is JPEG, 50 4B 03 04 is ZIP. To find a signature further inside a file, search for it in hex bytes mode.
No, the view is read-only. Export the part you need as xxd text, change it in any text editor, then paste it back in Paste hex dump mode and download the rebuilt .bin.
Still have a question?
Load the example PNG to see its signature, IHDR chunk and big-endian width in the inspector, then open a file of your own in the hex viewer.
Everything runs locally in your browser.