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Image & PDF Base64 Encoder / Decoder

v1.0.0

Image & PDF Base64 Encoder / Decoder

Encode images (PNG, JPG, WebP, SVG, GIF, AVIF) and PDFs to Base64 or decode Base64 strings back to files — fully in-browser.

Warning

This tool is not supported on mobile devices, please use a desktop device for better experience.

Supported: PNG, JPG, GIF, WebP, SVG, BMP, AVIF, PDF · Max 10 MB

Options
Output Format

Applies to Encode mode

Data URI includes MIME prefix — paste-ready for HTML/CSS

  • Convert PNG images to ICO format for favicons, Windows application icons, and desktop shortcuts.

  • Convert JSON data into TypeScript interfaces for easy integration with your codebase.

  • Convert Markdown files to HTML format for web publishing and sharing.

  • Extract and convert Windows ICO icons to PNG format, preserving transparency and the highest available resolution.

  • Convert JSON data to YAML format for readable configuration and documentation.

  • Convert Markdown files to PDF format for easy sharing and printing.

  • Convert ASP.NET Core appsettings.json files to .env environment variable format. Supports Development and Production presets. Fully client-side.

  • Convert JSON data into Rust structs for easy integration with your codebase.

  • Convert JSON data into JavaScript object declarations with customizable variable names and export options.

  • Convert JSON data into CSV format for easier data analysis and sharing.

  • Convert CSV files to JSON format for easier data manipulation and integration.

  • Convert SVG markup to PNG, JPEG, or WebP images directly in your browser with custom resolution and background.

  • Convert YAML configuration files to JSON format for easier processing and integration.

  • Convert any JSON object or array into a JSON Schema. Supports Draft-07, 2019-09, and 2020-12 with options for required fields, additionalProperties, and format inference.

  • Volume Converter
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  • Convert between Celsius, Fahrenheit, and Kelvin temperature scales with ease.

  • A number base converter lets you switch a value between decimal (base 10), hexadecimal (base 16), binary (base 2), and octal (base 8). It is handy when you work with low-level code, color values, network masks, or debugging binary data.

  • Length Converter
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  • Weight Converter
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  • Convert between different units of data storage, such as bytes, kilobytes, and gigabytes.

  • Convert any time between time zones. Enter a time, date, or Unix timestamp, pick source and target IANA time zones, and instantly see the result in multiple formats. Auto-detects your local timezone.

  • Encode and decode URLs with support for both standard URI encoding and component encoding methods.

  • Encode and decode base64 strings or files, commonly used for encoding binary data in text format.

  • Color Converter
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  • Convert cURL and wget commands to code in Python, JavaScript (fetch/axios), Go, PHP, C#, and more. Also convert between cURL and wget formats.

  • Case Converter
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About Image & PDF Base64 Encoder / Decoder

Base64 encoding converts binary files — images, PDFs, and other assets — into a plain ASCII string that can be safely embedded in HTML, CSS, JSON, or transmitted over text-only channels. This tool handles the conversion entirely in your browser: no file is ever uploaded to a server.

Encode — Image or PDF to Base64

Select any image (PNG, JPG, GIF, WebP, SVG, BMP, AVIF) or PDF up to 10 MB. The tool reads it with the browser FileReader API and outputs either a ready-to-paste Data URI or a raw Base64 string.

  • Data URI — includes the MIME prefix (data:image/png;base64,…). Drop it straight into an HTML src attribute or CSS url().
  • Raw Base64 — the encoded bytes only, without any prefix. Use this when the consuming API or format already knows the MIME type.

Decode — Base64 to Image or PDF

Paste a Base64 string — either a full Data URI or raw Base64 — and click Decode. The tool reconstructs the original binary, shows a live preview for images, and lets you download the restored file.

Common Use Cases

  • Inline images in HTML/CSS — embed small icons or backgrounds without an extra HTTP request.
  • API payloads — send file attachments as JSON strings when a binary endpoint is unavailable.
  • Email attachments — MIME email encodes attachments in Base64 for safe transmission.
  • Data URIs in CSS — bundle small assets into a stylesheet to reduce round trips.
  • Debugging — inspect or recover a Base64 blob received from an API response.

Privacy

All processing happens locally in your browser using the Web FileReader and Blob APIs. Your files are never sent to any server.

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