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CyberChef – A Cyber Swiss Army Knife

Screenshot of gchq.github.io captured 2026-07-20
Page preview · captured 2026-07-20

Resurfaced independently across 6 calendar years, with breakout response in 4 of them.

submissions
10
submitters
10
observed span
2016–2024
peak thread · 139 comments
785 pts
latest 20+ return · 2024-02-01
174 pts

Submission timeline

2007–2026

One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.

First comments on top threads

HN comment order

This looks like a handy tool, certainly for puzzles and exploring encodings. It makes decoding puzzles like this very quick! 11100111 10111011 10011101 11100100 10111000 10001101 11100100 10111100 10011010 11100110 10010100 10111110 11100101 10111100 10000011 11100100 10111101 10100000

It's funny looking at some of the contributors to this. Some of the accounts seem to be vague, single-duty accounts made for the express purpose of contributing code to CyberChef and nothing else. I admire their OPSEC (From: https://github.com/gchq/CyberChef/graphs/contributors) https://github.com/n1474335 https://github.com/j433866 https://github.com/d98762625 https://github.com/s2224834 https://github.com/GCHQ77703

I'm a big fan of CyberChef. One of its most useful features is "magic" and turning on "intensive mode". This will automatically detect the encoding used and can often detect 2-3 levels of encoding.

An amazing tool, allows all kinds of manipulation to be done on data, really helpful in CTF games.

The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.

Breakout years
4

100+ points or 50+ comments

Total points
1760

reference only — not used in Hall rules or ranking

Total comments
311

reference only — not used in Hall rules or ranking

Every submission

DateTitle as submittedByPointsComments
2016-11-28CyberChef – A Cyber Swiss Army KnifeFirst breakout · Best threadrobin_reala785139
2019-03-25CyberChef – The Cyber Swiss Army Knifeweinzierl20
2019-07-27CyberChef - The Cyber Swiss Army Knifeqbranch31
2019-08-22CyberChef – Cyber Swiss Army Knifeonion2k39459
2021-04-18The Cyber Swiss Army Knife – encryption, encoding, compression and moreHall inductiontzury30
2022-01-02CyberChefthunderbong40
2022-01-18CyberChef – The Cyber Swiss Army Knifesimonpure39254
2023-08-26Decoding QR code text outputhagelslag21
2023-09-26CyberChefgorenb10
2024-02-01CyberChef from GCHQ: Cyber Swiss Army KnifeLatest 20+ point return_xerces_17457