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CyberChef

https://gchq.github.io/CyberChef/

ciphereditor

https://ciphereditor.com/

Cryptii

https://cryptii.com/

Cryptii v2

https://v2.cryptii.com/text/select

Xlate

https://paulschou.com/tools/xlate/ (has custom octal)

dCode

https://www.dcode.fr/ (top tier)

GeocachingToolBox

https://www.geocachingtoolbox.com

Rumkin

http://rumkin.com/tools/cipher


Quipqiup

https://quipqiup.com/

Boxentriq

https://www.boxentriq.com/code-breaking/cryptogram

Guballa

https://www.guballa.de/substitution-solver (in English, German, Spanish, French, Dutch & Portuguese)


Boxentriq

https://www.boxentriq.com/code-breaking/vigenere-cipher auto vigenére with key length limitation

Guballa

https://www.guballa.de/vigenere-solver (auto vigenére & beaufort decoder in English, German, Spanish, French, Dutch & Portuguese)

F00l

https://f00l.de/hacking/vigenere.php (vigenére key length calculator)


Audio Morse

https://morsecode.world/international/decoder/audio-decoder-adaptive.html

Spectrogram creator

https://nsspot.herokuapp.com/imagetoaudio/


Caesar

http://theblob.org/rot.cgi (Caesar for letters & numbers) https://planetcalc.com/1434/ (alphabets for English, French Portuguese, Russian & Spanish) https://a4x.me/tools/text/ (easy atbash/reverse/rot testing) https://a4x.me/tools/ngram/ (transcribes text in any group length)


Cipher Identifiers:

https://bionsgadgets.appspot.com/gadget_forms/refscore_extended.html https://www.dcode.fr/cipher-identifier https://www.boxentriq.com/code-breaking/cipher-identifier

base64 looking text

https://aesencryption.net/ https://www.online-toolz.com/tools/text-encryption-decryption.php/ https://codebeautify.org/encrypt-decrypt https://encipher.it/ https://pteo.paranoiaworks.mobi/ https://www.samltool.com/decode.php

View non-printables

https://www.soscisurvey.de/tools/view-chars.php

Word completer

https://www.onelook.com/ (search ??i???n??e and get CHIMPANZEE for example)>

Byte shift

https://cyber.meme.tips/xlate/shifts.html (View all byte shifts and all constant XOR’s)

Casing inverter

https://www.browserling.com/tools/text-invert-case

English language frequencies

https://www3.nd.edu/~busiforc/handouts/cryptography/cryptography%20hints.html

Esolangs decoder

https://tio.run/#

Large number converter

https://www.mobilefish.com/services/big_number/big_number.php (Binary, hex, decimal & base64 conversion)


Image:

Stegonline

https://stegonline.georgeom.net/image (RGB value extraction)

AperiSolve

https://aperisolve.fr/ (Image analysis, uses Binwalk, Steghide, Outguess, Foremost, Strings, Exiftool & Zteg)

Metadata viewer

https://www.metadata2go.com/

RAW pixels viewer

https://rawpixels.net/

Image forensics

https://29a.ch/photo-forensics/#forensic-magnifier

Punch Card decoder

http://laighside.com/punchcard.htm

Spectrogram creator

https://nsspot.herokuapp.com/imagetoaudio/

Random steg websites:

Futureboy

https://futureboy.us/stegano/decinput.html (JPGs only)

Mobilefish

https://www.mobilefish.com/services/steganography/steganography.php

Random steg programs:

Steganpeg

https://steganpeg.apponic.com/ (JPGs only)

Outguess

https://www.rbcafe.com/software/outguess/ (JPGs only)

Openpuff

https://openpuff.en.lo4d.com/windows

Silenteye

https://sourceforge.net/projects/silenteye/

Others:

Youtube video tag extractor

https://online-free-tools.com/en/youtube_video_tags_extract_url

Link identifier

https://a4x.me/tools/link/ (oHg5SJYRHA0 for example)

Hex viewer/editor

https://hexed.it/

QR code recovery/building:

https://merricx.github.io/qrazybox/

Hash:

Hash identifier

https://hashes.com/en/tools/hash_identifier

Hash “cracker”

https://crackstation.net/