ClearEvo Hex viewer/editor online: search hex, text - and bit sequences across octets

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One more tool for the browser-tools series - a hex viewer/editor:

https://www.clearevo.com/hex/

A viewer/editor where the file is processed entirely in your browser - nothing is uploaded anywhere (Google Analytics for visit stats only). Editing is overwrite-in-place with modified bytes highlighted, and you save the edited copy back out.

Step-by-step user guide: How to view, edit and search a binary file in your browser.

The part I cared most about is the search, in the spirit of what I liked in bless:

• hex sequence - DE AD BE EF, separators optional
• text - plain string, encoded and searched as bytes
• bit sequence at any bit offset - paste a pattern like 101100111 and it will find it even when it straddles octet boundaries, reporting the match as byte offset + bit offset. Handy for bit-packed telecom/GNSS payloads where fields don’t align to bytes.

Searches wrap around, Enter or C-s finds the next match, and there’s a goto-offset box (hex).

Please test it on real files and comment below - file size limits, missing features (insert/delete bytes is the obvious one; today it’s overwrite-only), whatever you hit.

Full disclosure: this post - and any code or tool it describes - was co-authored with Claude (Anthropic’s AI, via Claude Code). I directed, guided and reviewed. I don’t want to pretend otherwise.