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CyberChef

https://gchq.github.io/CyberChef/ (top tier)

dCode

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

ciphereditor

https://ciphereditor.com/

Cryptii

https://cryptii.com/

Cryptii v2

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

GeocachingToolBox

https://www.geocachingtoolbox.com

Rumkin

http://rumkin.com/tools/cipher



Monoalphabetic Substitution:

Quipqiup

https://quipqiup.com/ auto solver

Boxentriq

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

Guballa

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

Polyalphabetic substitution:

Boxentriq

https://www.boxentriq.com/code-breaking/vigenere-cipher (best vigenere with no key solver)

Guballa

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

F00l

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

Caesar:

Regular Caesar

https://a4x.me/tools/text/ (easy atbash/reverse/rot testing)

Caesar with numbers as well

http://theblob.org/rot.cgi

Caesar with other language alphabets

https://planetcalc.com/1434/ (alphabets for English, French Portuguese, Russian & Spanish)

Cipher Identifiers:

dCode Cipher Identifier

https://www.dcode.fr/cipher-identifier(best one)

bionsgadgets Cipher Identifier

https://bionsgadgets.appspot.com/gadget_forms/refscore_extended.html

Boxentriq Cipher Identifier

https://www.boxentriq.com/code-breaking/cipher-identifier

base64 Looking Text:

Dumpster Diver (random b64 looking text brute forcer)

https://corgi.rip/dive

Aesencryption.net (AES)

https://aesencryption.net/

Stupid Base64 aka SB64 (AES)

https://www.online-toolz.com/tools/text-encryption-decryption.php/

Codebautify (Arcfour)

https://codebeautify.org/encrypt-decrypt

encipher.it (AES PGP)

https://encipher.it/

Paranoiaworks (AES EAX)

https://pteo.paranoiaworks.mobi/

samltool (XML)

https://www.samltool.com/decode.php

aesdecryption (AES)

https://decipher.neocities.org/aes-decryption

samltool (base64 + decompression)

https://www.samltool.com/decode.php

gAAAAA AES, aka Ferdecode

https://asecuritysite.com/encryption/ferdecode

browserling (salted openssl)

https://www.browserling.com/tools/aes-encrypt

Devglan (AES)

https://www.devglan.com/online-tools/text-encryption-decryption

invertexto (AES)

https://www.invertexto.com/texto-criptografado

encode-decode (AES)

https://encode-decode.com/aes256-encrypt-online/

anycript (AES)

https://anycript.com/

cryptoi (AES presented in emojis)

https://web.archive.org/web/20220915201921/https://cryptoji.com/

Others:

n-gram transcription

https://www.dcode.fr/alphabetic-transcription (transcribes text in any group length)

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)

Link identifier

https://a4x.me/tools/link/ (oHg5SJYRHA0 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 1

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

English language frequencies 2

https://norvig.com/mayzner.html

Esolangs decoder

https://tio.run/#

Large number converter

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

invisible characters in text decoder

https://330k.github.io/misc_tools/unicode_steganography.html

Dork search tool

https://www.dorksearch.com/

Osint framework

https://osintframework.com/



Audio Morse

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

Spectrogram creator

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



Free photoshop online

https://www.photopea.com/

Symbol cipher identifier

https://decipher.neocities.org/symbols

Cryptographers portrait identifier

https://decipher.neocities.org/cryptographers

Steganography identifier

https://docs.google.com/spreadsheets/d/1R1Lx46fIdX9LeZatuh0L6e-lLuNp4k1dqM4PBmMXQ7E/edit#gid=0

RGB value extractor

https://stegonline.georgeom.net/image

AperiSolve

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

Metadata viewer

https://www.metadata2go.com/

RAW pixels viewer (zooms on images while showing data)

https://rawpixels.net/

Image forensics

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

Punch Card decoder

http://laighside.com/punchcard.htm

Random steg websites:


Futureboy

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

Mobilefish

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

Manytools

https://manytools.org/hacker-tools/steganography-encode-text-into-image/(png only)

Pelock

https://www.pelock.com/products/steganography-online-codec

Peter Eigenchink steg

https://www.peter-eigenschink.at/projects/steganographyjs/showcase/

ImageOnline

https://encrypt.imageonline.co/

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/




Youtube video tag extractor

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

File hex viewer/editor

https://hexed.it/

QR code recovery/building:

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




Hash identifier

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

Online hash cracker

https://hashmob.net/search

Zip/Rar file hash extractor

https://hashes.com/en/johntheripper/zip2john