A hex editor in your browser
A file Filepeek doesn't open shows what it is and every byte, and one that won't open shows its bytes too. Read them, search them and change them, then save a copy. Nothing leaves your device.
Or drop it anywhere on this page
What you'll see
Its bytes on a page as wide as they need, 16 a row with their text beside them, colored by what each byte is.
- Every byte in hex and text • Zeros, text and the rest in their own colors
- Search for text, hex with ?? for any byte, or a number
- Inspect • The numbers, dates and characters at any byte
- Type over, insert or delete • Undo, and save a copy
Which files show their bytes
Filepeek opens every kind of file it knows in its own viewer. The bytes are for the rest.
- Files Filepeek doesn't open, like a .bin or a .dat • Their About card says what they are, and Hex editor beside it shows their bytes
- Files that won't open, cut off or damaged • View in hex editor opens a PNG, JPEG, GIF, ZIP or gzip file where it breaks
- Every other file opens as what it is • A picture as a picture, a PDF as a PDF
Made for any file
It reads the bytes on show and those a search goes through, so a file of many GB opens at once and scrolls like a small one. Go to takes an offset in hex or decimal, and a step from where you are with + or -.
Edits sit beside the file, never in it. Save downloads a new file with them, Save original the file as it opened, and leaving with changes not saved asks first.
It runs in your browser on computers and phones, where a keypad types the hex. Nothing you open is sent anywhere.
Questions
Will it change my file?
Never. Save downloads a new file with your changes, and the file you opened stays as it was.
Can it open a 4 GB file?
Yes. It reads only the bytes on show and those a search goes through, so a big file opens at once and scrolls like a small one.
Why do some bytes show as dots?
The text column shows printable ASCII as itself and every other byte, like a zero or a line break, as a dot. Their hex beside them is always exact.
Will an edited file still work?
That depends on the file. Many formats keep checksums or the lengths of their parts, so a changed byte can make an app refuse it. Keep the original, which never changes.
Why does a PNG open as a picture and not as bytes?
Filepeek opens every kind of file it knows in its own viewer. Bytes show for files it doesn't open and for files that won't open.