File hex viewer
ClientHex dump with offset, hex, and ASCII columns—local only. Pair with Encoding tools for text encodings.
About File hex viewer
Hex dump the first 256 KB of any file with ASCII sidebar—read locally, no upload. The interactive transform on this page runs in your browser tab—Toolcore does not need your paste for the core operation described above.
How to use this page
Paste or type in the main workspace, run the primary action from the toolbar, then copy or download the result. Use Load example when the page offers it, or URL prefill (?q= / ?qb=) so agents and tickets open the same input.
Reads up to 256.0 KB in your browser—no upload.
?
Classic 16-byte rows with offset, hex, and ASCII sidebar. Binary-safe; not a full hex editor.
Nearby workflows on Toolcore
- Hex encode & decode — UTF-8 text to hex and hex to text—strip spaces, local only. when the payload needs a different encoding or escape format.
- File checksum & hash — SHA-256, SHA-512, MD5, CRC-32, and more for a local file—verify downloads without uploading. when the payload needs a different encoding or escape format.
- Encoding tools — Hub index: Base64 & URL, Base64url, Base32, Crockford, LEB128, ASCII85, Z85, Base58, base-36, bencode, Morse, quoted-printable, URI, Puny… when the payload needs a different encoding or escape format.
- CRC-32 & CRC-32C — IEEE CRC-32 and Castagnoli CRC32C on UTF-8 text or raw hex bytes—ZIP/PNG family vs iSCSI/protobuf; local only, complements file checksum for whole-file digests. when the payload needs a different encoding or escape format.
Common use cases
- Peek magic bytes and headers of unknown binaries before deeper analysis.
- Compare firmware or certificate blobs at a glance.
- Spot UTF-8 BOM or null padding in exported data files.
Common mistakes to avoid
Opening huge files entirely
Only the first 256 KB is read to keep the tab responsive—use CLI tools for full dumps.
Treating ASCII column as decoded text
Printable ASCII is a hint; non-text bytes show as dots.
FAQ
Is the file uploaded?
No. FileReader loads a slice in your browser only.
What is the size limit?
Up to 256 KB is shown per pick; larger files are truncated with a size note.
More tools
Related utilities you can open in another tab—mostly client-side.
Hex encode & decode
ClientUTF-8 text to hex and hex to text—strip spaces, local only.
File checksum & hash
ClientSHA-256, SHA-512, MD5, CRC-32, and more for a local file—verify downloads without uploading.
Encoding tools
ClientHub index: Base64 & URL, Base64url, Base32, Crockford, LEB128, ASCII85, Z85, Base58, base-36, bencode, Morse, quoted-printable, URI, Punycode/IDN, Unicode escapes, data URLs, MIME, hex, HTML entities, JWT, JSON helpers, crypto.
CRC-32 & CRC-32C
ClientIEEE CRC-32 and Castagnoli CRC32C on UTF-8 text or raw hex bytes—ZIP/PNG family vs iSCSI/protobuf; local only, complements file checksum for whole-file digests.