NO

Verktøy

Base64-verktøyLector de Base64Valider Base64Reparer feilformet Base64JWT-dekoderVerificar Base64Comparar Base64Data-URL til bildeDesenvolver Base64 anidadoSocial & SEO toolsRegional toolsHashtag generatorYouTube tagsPIX QRP7M viewerGenerador de código QRIBAN validatorComprimir imagenNormaliser Base64Base64-standarddetektorGjenkjenning av tegnkodingCSS data-URI-konverterSjekk gzip-komprimeringHTTP-forespørsel onlineUuencoded fildekoderCalculadora de tamaño Base64Contador de tokens de IALimpiador de texto LLMRedactor de secretosURL-kode / dekodeConversor de imágenesUnir PDFFile to bytesPDF tools hubCompress PDFSplit PDFPDF to imageWord counterCase converterRotate PDFWatermark PDFOrganize PDFPDF page numbersSign PDFUnlock PDFUnit converterLorem ipsumJSON tree viewerPDF form fillerGzip comprimir / descomprimirQuitar fondoGenerador de faviconQuitar metadatos EXIFGenerador de hashFormateador JSONProbador de regexExplicador de cronComparador de texto (diff)Calculadora de subredYAML ↔ JSONGenerador de UUIDConversor de timestampGenerador de contraseñasGenerador de Amigo InvisibleCuenta atrás de NavidadSocial meta tagsInstagram hashtagsTikTok hashtagsX / Twitter hashtagsLinkedIn hashtagsFacebook hashtagsPinterest hashtagsThreads hashtagsBluesky hashtagsYouTube Shorts hashtagsCaption counterUTM builderE-invoice viewerXRechnung viewerFactur-X checkerPeppol UBL viewerPT invoice QRChatGPT export viewerICS generatorWhatsApp linkCPF generatorCNPJ generatorNIF generatorINN generatorSNILS generatorVAT calculatorhreflang generatorSchema generatorMedia tools hubByte-konverterHex converterCSV ↔ JSONColor converter

Base64-standarder

Published

In this guide

This standards reference on Base64Encoding explains standards in plain language for developers and everyday users.

Everything important stays private: try the matching converter or tool in your browser — files and tokens are not uploaded.

Read the full English article below for code samples and edge cases, or switch language anytime from the menu. We keep expanding translations from real user feedback.

Try these private tools next

“Base64” is a family of encodings. They all share the same 3-bytes-to-4-characters algorithm but differ in the last two alphabet characters, padding, line wrapping and extra framing.

Standard Chars 62/63 Padding Line length Used in
Standard (RFC 4648 §4) + / required none APIs, JSON, data URIs
MIME (RFC 2045) + / required max. 76 E-mail attachments
PEM (RFC 7468) + / required exactly 64 Certificates, keys
Base64URL (RFC 4648 §5) - _ optional none URLs, JWT, file names
IMAP (RFC 3501) + , none none Mailbox names in modified UTF-7
XML name token / identifier . - / _ : none none XML NMTOKEN and Name values
OpenPGP armor (RFC 4880) + / required max. 76 PGP messages, with CRC-24 checksum

Not sure which one you have? Use the standard detector, then convert between them with normalization.

Standard Base64 The standard Base64 encoding defined in RFC 4648 section 4: alphabet, mandatory padding, no line breaks, canonical encoding and validation regex. Base64URL What Base64URL is, how it differs from standard Base64 (- and _ instead of + and /, no padding), where it is used (JWT, URLs) and how to convert between them. MIME Base64 Base64 Content-Transfer-Encoding for e-mail as defined in RFC 2045: 76-character lines, CRLF line endings, ignored characters and how attachments are encoded. PEM What the PEM format is: Base64-encoded DER data between -----BEGIN----- and -----END----- lines, 64-character line wrapping, common labels and conversion. IMAP How IMAP mailbox names use a Base64 variant with + and , (RFC 3501 modified UTF-7). Alphabet, no padding, and how to decode IMAP Base64 online. XML XML Base64 variants for NMTOKEN (. -) and Name (_ :) values. How they differ from RFC 4648 and when to use them in XML documents. OpenPGP OpenPGP ASCII armor wraps Base64 in BEGIN/END headers with a CRC-24 checksum. How it differs from MIME Base64 and how to decode armored messages online.

Ofte stilte spørsmål

Does this page upload my data?

No. Articles are static. Linked tools run locally in your browser unless a feature explicitly needs a network relay.

Can I request a translation or a new tool?

Yes — use the private feedback form. We prioritize what users ask for across languages.

What is the fastest way to try standards?

Open the homepage Base64 converter or the related tools linked on this page and paste a sample.

Relaterte verktøy og guider

Kommentarer (0)

Spørsmål, idéer eller en feil i «Base64-standarder»? Legg igjen en kommentar, vurder verktøyet, eller svar andre.

Ingen kommentarer ennå. Bli den første til å dele tilbakemeldingen din!

Legg igjen en kommentar

Vurder dette verktøyet:
Esc
↑ ↓ flytt↵ åpneEsc lukk