YAML to Base64

Normalise a YAML document and encode it as UTF-8 Base64 — ideal for Kubernetes Secrets

Input

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Output

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What is YAML to Base64

Last reviewed: April 18, 2026

YAML is a human-friendly data serialization format that relies on indentation instead of braces, commonly used for configuration in Kubernetes, CI/CD, and modern tooling.

YAML to Base64 parses your YAML, re-emits it with a canonical two-space indent and long-line tolerance, and encodes the result as UTF-8 Base64 using the browser's btoa.

It's the fastest way to prepare YAML payloads for Kubernetes Secrets, Docker config blobs, and any system that accepts Base64-encoded config strings.

Why use it

Prepare values for Kubernetes Secret data fields.
Pack YAML configs into CI / CD environment variables.
Embed YAML inside JSON-based deployment manifests.
Produce fixed Base64 payloads for tests.
Round-trip configs through systems that strip newlines.

Features

Parses and normalises YAML
UTF-8 safe Base64 encoding
Kubernetes Secret-ready output
YAML to Base64 never leaves your machine
Stable, diff-friendly normalisation

How to use YAML to Base64

Paste YAML. Drop your YAML document.
Click Run. YAML is normalised and Base64-encoded.
Copy result. Paste into your Kubernetes Secret or config.

Example (before/after)

YAML

name: Ada
role: admin

Base64

bmFtZTogQWRhCnJvbGU6IGFkbWluCg==

Common errors

Non-UTF-8 characters

btoa only handles Latin-1.

Fix: The tool first converts to UTF-8 via encodeURIComponent/unescape before Base64 encoding.

Mixed indentation

Irregular indentation can break YAML parsing.

Fix: Run the YAML formatter first.

FAQ

Is output standard Base64?

Yes — UTF-8 bytes are encoded using the standard Base64 alphabet.

Does it normalise the YAML?

Yes — the tool re-emits with two-space indent before encoding so diffs are stable.

Is it the same as Kubernetes Secret format?

Yes — you can paste the output directly into a `data:` block.

Does it support multi-doc YAML?

Single-document YAML only for now. Split multi-docs manually first.

Is input uploaded?

No — encoding runs in your browser.

Related tools

Pair YAML to Base64 with formatter, validator, and JSON converters. You can also browse the full Encoders & Decoders category for more options.

YAML Formatter

Format and beautify YAML content online with proper indentation and flow styles. Paste YAML and get clean, readable output instantly.

YAML Validator

Validate YAML syntax online and catch indentation and structure errors instantly. Paste YAML config files and get detailed error messages with line numbers.

YAML to JSON

Convert YAML to JSON format

Base64 Encoder/Decoder

Encode or decode Base64 strings

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Turn a YAML list of records into a CSV file ready to open in Excel, Google Sheets, or Numbers

YAML to CSV

Convert YAML objects or arrays into CSV online with inferred columns, escaped cells, and copy-ready rows for spreadsheets, imports, and data cleanup.

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JPG to Base64 Converter

Convert JPG or JPEG images into Base64 data URLs for inline HTML, CSS, or JSON — 100% browser-based

PNG to Base64 Converter

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SVG to Base64 Converter

Encode SVG vector images as Base64 data URLs so you can paste them directly into CSS background-image or HTML