the full catalog

All 90 decoder tools

Every decoder on the site, in one searchable list — 90 live today and more shipping. Search by tool name, format or keyword, or jump to a category below. All of them run locally in your browser.

Data, Radix & String

15 tools

Base64

Decode Base64 and URL-safe Base64 to text or raw bytes, instantly and locally.

Base32 / Base58 / Base85

Decode Base32, Base58 and ASCII85/Base85 encoded strings.

Base45

Decode Base45 payloads used in EU Digital COVID Certificates and QR data.

Hex to Text

Convert hexadecimal (Base16) back to readable text or a raw byte view.

quoted-printable-decoder

Quoted-Printable

Decode MIME quoted-printable email encoding back to plain text.

URL

Decode percent-encoded URL and query-string components.

html-entity-decoder

HTML Entity

Turn named and numeric HTML entities back into their characters.

unicode-escape-decoder

Unicode Escape

Decode \uXXXX and \xNN escape sequences into Unicode text.

Hexdump & Byte Stream

Render any input as an offset / hex / ASCII hexdump.

Binary to Text

Decode space- or byte-delimited binary back into text.

octal-decimal-decoder

Octal & Decimal to ASCII

Convert octal or decimal character codes into ASCII text.

punycode-decoder

Punycode (IDN)

Decode xn-- Punycode internationalized domain names to Unicode.

morse-code-decoder

Morse Code

Translate Morse code dots and dashes into text and back.

braille-decoder

Braille

Decode Unicode Braille patterns into Latin text.

kana-romaji-converter

Japanese Kana to Romaji

Transliterate hiragana and katakana into romaji.

Web, API & Tokens

10 tools

JWT

Decode a JWT's header and payload and inspect its claims and expiry.

SAML Response

Base64-inflate a SAML response and view the XML assertion.

oauth-token-decoder

OAuth 2.0 Token

Inspect OAuth access and refresh tokens, including JWT-shaped ones.

oidc-token-decoder

OpenID Connect (OIDC) Token

Decode OIDC id_tokens and read standard identity claims.

Cookie & Session

Parse a Cookie header into name/value pairs and decode session blobs.

viewstate-decoder

ViewState (.ASPX)

Base64-decode ASP.NET __VIEWSTATE and inspect its structure.

php-serialize-decoder

PHP Serialized Object

Parse PHP serialize() output into a readable structure.

protobuf-decoder

Protobuf Raw

Decode raw protocol-buffer wire bytes without a schema.

graphql-decoder

GraphQL Query

Pretty-print and inspect GraphQL queries and schema documents.

data-uri-parser

Data URI

Split a data: URI into MIME type, encoding and decoded payload.

Security, PKI & Crypto

9 tools

x509-certificate-decoder

X.509 Certificate

Parse a PEM/DER certificate and read its subject, issuer and validity.

CSR

Decode a Certificate Signing Request and view its subject and key.

pem-der-decoder

PEM / DER / PKCS

Split and inspect PEM, DER, PKCS#7 and PKCS#12 certificate bundles.

SPIFFE Certificate

Extract SPIFFE IDs and SVIDs from workload certificates.

ssh-key-decoder

SSH Key

Decode SSH public and private key blobs and read their fields.

PGP / GPG Armored

De-armor PGP keys and messages and inspect their packets.

ASN.1 & OID

Walk an ASN.1 DER structure and resolve object identifiers.

kerberos-ticket-decoder

LDAP / Kerberos Ticket

Decode Kerberos tickets and LDAP structures.

NTLM Auth Header

Parse NTLM type 1/2/3 authentication messages.

Classical & Obfuscated Ciphers

11 tools

ROT13 / ROT47

Apply ROT13, ROT18 and ROT47 rotation ciphers both ways.

caesar-cipher-decoder

Caesar Cipher

Try all 25 Caesar shifts at once and read the plaintext.

vigenere-decoder

Vigenère Cipher

Decode Vigenère and autokey ciphers with a known key.

atbash-affine-decoder

Atbash & Affine Cipher

Decode Atbash and affine substitution ciphers.

playfair-decoder

Playfair Cipher

Decrypt Playfair digraph ciphers from a keyword matrix.

baconian-cipher-decoder

Baconian Cipher

Decode Bacon's biliteral cipher from A/B groups.

enigma-simulator

Enigma Machine

Simulate M3/M4 Enigma rotors and decode messages.

lorenz-typex-decoder

Lorenz / Typex

Simulate Lorenz and Typex teleprinter ciphers.

XOR Cipher

XOR data against a key, or brute-force single-byte XOR.

brainfuck-decoder

Brainfuck

Execute Brainfuck and unpack JSFuck esoteric code.

zero-width-decoder

Zero-Width Steganography

Extract hidden messages encoded in zero-width characters.

Image, Media & Steganography

9 tools

lsb-steganography-decoder

LSB Image Steganography

Recover data hidden in the least-significant bits of an image.

steghide-extractor

Steghide / OpenStego

Extract payloads embedded by common steg tools.

audio-steganography-decoder

Audio Steganography

Decode DeepSound and SilentEye audio-hidden payloads.

qr-code-decoder

QR Code

Scan QR and matrix codes from an uploaded image.

barcode-decoder

Barcode Decoder (UPC / EAN / ISBN)

Read linear barcodes and validate their check digits.

EXIF Metadata

Pull camera, GPS and authoring metadata out of images.

smpte-timecode-decoder

SMPTE Timecode

Decode SMPTE video timecode and frame rates.

id3-tag-decoder

ID3 Audio Tag

Read ID3v1/v2 tags and metadata from audio files.

base64-media-decoder

Base64 Media Data URI

Preview and decode base64 image, audio and video data URIs.

Network, System & Packets

10 tools

tcp-udp-header-decoder

TCP / UDP / ICMP Header

Decode transport-layer packet headers from hex.

ip-header-decoder

IP Header & CIDR

Decode IP headers and expand CIDR subnet ranges.

dns-record-decoder

DNS Record

Parse DNS wire messages and resource records.

http-header-decoder

HTTP Request / Response

Parse raw HTTP messages into structured headers and body.

BGP Attribute

Decode BGP path attributes from raw bytes.

PCAP / PCAPNG

Inspect capture-file structure and packet records.

mac-address-lookup

MAC Address (OUI)

Resolve a MAC address to its vendor and inspect its bits.

user-agent-parser

User-Agent

Break a User-Agent down into browser, engine and OS.

cron-expression-decoder

Cron Expression

Translate a cron expression into plain English.

chmod-calculator

Chmod Permission

Convert octal or symbolic chmod modes into readable permissions.

Hardware, Radio & Telecom

9 tools

DTMF Touch-Tone

Decode dual-tone multi-frequency dial tones.

APRS Radio

Decode APRS position and message packets.

ADS-B Message

Decode raw Mode-S / ADS-B aircraft telemetry frames.

AIS Vessel

Decode AIS NMEA 0183 vessel-tracking payloads.

obd2-code-decoder

OBD-II Trouble Code

Look up OBD-II diagnostic trouble codes (DTCs).

can-bus-decoder

CAN Bus Packet

Decode CAN bus frames and identifiers.

MIDI Message

Decode MIDI status and data bytes into events.

RS-232 / Serial

Analyze serial framing, baud and byte values.

Sub-GHz / 433MHz

Decode 433MHz remote-control signal captures.

File Format & Archives

8 tools

gzip-decompressor

Gzip / Zlib / Deflate Decompressor

Inflate gzip, zlib and raw deflate streams in the browser.

Tar / Zip / 7z

List entries and headers inside archive files.

bzip2-lzma-decoder

Bzip2 / LZMA

Decompress bzip2 and LZMA/XZ streams.

parquet-avro-decoder

Parquet / Avro Header

Read Parquet and Avro file headers and schemas.

sqlite-header-decoder

SQLite Header

Decode a SQLite database header and page layout.

registry-hive-decoder

Windows Registry Hive

Parse .DAT/.REG registry hive structures.

TrueType / OpenType

Read font tables, names and glyph counts.

PDF Structure

Walk PDF objects, streams and the xref table.

Identification & Serials

9 tools

VIN

Decode a Vehicle Identification Number's WMI, year and checksum.

IMEI

Validate an IMEI with Luhn and read its TAC.

credit-card-bin-decoder

Credit Card BIN

Identify a card's network and validate it with Luhn.

IBAN Decoder &

Validate an IBAN's checksum and read its country and account parts.

GTIN / UPC

Validate GTIN/UPC check digits and structure.

gs1-128-decoder

GS1-128 Barcode

Parse GS1-128 application identifiers from a barcode string.

UUID / GUID

Read a UUID's version, variant and embedded timestamp.

ulid-snowflake-decoder

ULID / Snowflake ID

Extract the timestamp and shard from ULIDs and Snowflake IDs.

unix-timestamp-converter

Unix Timestamp

Convert Unix epoch, ISO 8601 and RFC 2822 timestamps to human dates.