Inline Asset Compressor
Compress inline SVGs, base64 images, and JSON data blocks embedded in HTML online for free. Our inline asset compressor scans your HTML for all four inline asset types, compresses each one individually, and shows a per-asset savings table — so you can see exactly where your HTML weight comes from. Supports SVG minification, base64 data URI cleaning, JSON-LD script block minification, and JSON data attribute compression. All processing happens in your browser. No signup required.
Asset Types to Compress
Why Use Our Inline Asset Compressor?
Per-Asset Savings Breakdown
Our inline asset compressor shows a per-asset savings table — each inline SVG, base64 image, and JSON block is listed individually with original size, compressed size, and reduction percentage, so you know exactly where your HTML weight comes from.
Instant Inline Asset Compression
Compress all inline SVGs, base64 images, and JSON data blocks in a single click — the inline asset compressor processes your entire HTML document and replaces each asset with its compressed version in the output.
Secure Inline Asset Compressor Online
Your HTML never leaves your device. All SVG minification, base64 cleaning, and JSON compression happens locally in your browser — no server upload, no cloud processing, complete privacy for proprietary templates and internal tools.
Inline Asset Compressor — No Installation
Compress inline HTML assets directly in your browser with zero software downloads, no plugins, and no account required. Our free inline asset compressor works on any modern browser on any operating system.
Common Use Cases for Inline Asset Compressor
Static Site & SSG Template Optimization
Static site generators (Next.js, Astro, Hugo) often inline SVG icons and JSON-LD structured data directly in HTML. Use the inline asset compressor to reduce the weight of generated HTML pages before deployment — especially effective for pages with many icon SVGs.
HTML Email Template Compression
HTML email templates frequently embed base64 images and inline SVG logos to avoid external image blocking. Use the inline asset compressor to clean base64 data URIs and minify SVGs — reducing email payload size and improving deliverability.
React & Vue Component SVG Optimization
React and Vue components that import SVGs as inline JSX often contain verbose SVG markup with comments and whitespace. Use the inline asset compressor to pre-process SVG source before converting to JSX — reduces component bundle size.
JSON-LD Structured Data Minification
SEO-optimized pages embed JSON-LD structured data in script blocks. Use the inline asset compressor to minify all JSON-LD blocks in your HTML — a 2 KB formatted JSON-LD block typically compresses to under 500 bytes with no semantic change.
Core Web Vitals HTML Weight Reduction
Large inline SVG illustrations and verbose JSON data attributes add to HTML document weight, increasing Time to First Byte (TTFB) and parse time. Use the inline asset compressor to reduce HTML payload and improve LCP and FID scores.
E-Commerce Product Page Optimization
E-commerce product pages often embed base64 placeholder images, inline SVG icons, and JSON product data attributes. Use the inline asset compressor to compress all three asset types in one pass — reducing page weight for faster mobile load times.
Understanding Inline Asset Compression
What is Inline Asset Compression?
Inline asset compression is the process of reducing the byte size of assets embedded directly inside HTML — including inline SVGs, base64-encoded images, and JSON data blocks. Unlike external assets (which are compressed separately), inline assets inflate the HTML document itself, increasing TTFB and parse time. Our inline asset compressor scans your HTML for all four inline asset types, compresses each one individually, replaces them in the output HTML, and shows a per-asset savings table — so you can see exactly where your HTML weight comes from and how much each compression saves.
How Our Inline Asset Compressor Works
- 1Paste or upload your HTML: Enter any HTML document, template, or component. The inline asset compressor scans for inline SVGs, base64 data URIs, JSON script blocks, and JSON data attributes — your HTML never leaves your browser.
- 2Choose asset types to compress: Select which inline asset types to process — SVGs, base64 images, JSON script blocks, and/or JSON data attributes. Each type uses a different compression strategy appropriate to its format.
- 3Review per-asset savings and download: The inline asset compressor shows a per-asset table with original size, compressed size, and reduction percentage for each asset found. Copy or download the compressed HTML output directly.
What Gets Compressed
- Inline SVGs: XML comments, blank lines, and whitespace between tags are removed. The XML declaration is stripped. Self-closing tags are normalized. Typical reduction: 20–50% for verbose SVG icons.
- Base64 Images: Some tools insert newlines every 76 characters inside base64 data URIs (per MIME spec). These whitespace characters are invalid in HTML data URIs and add unnecessary bytes. The inline asset compressor removes all embedded whitespace from base64 strings.
- JSON Script Blocks:
<script type="application/json">and JSON-LD blocks are minified usingJSON.parse+JSON.stringify— removes all whitespace, indentation, and blank lines while preserving the exact data structure. - JSON Data Attributes: JSON values in
data-*attributes (e.g.,data-config='{…}') are minified using the same JSON.parse + JSON.stringify approach — typical reduction: 30–60% for formatted JSON configuration objects.
Important Limitations
The inline asset compressor uses regex-based parsing — it correctly handles the most common inline asset patterns but may not detect assets inside JavaScript template literals, dynamically constructed HTML, or non-standard attribute formats. SVG minification preserves all semantic content but does not perform path optimization (use SVGO for that). Base64 cleaning only removes whitespace — it does not re-encode images at lower quality. Always test the compressed output in your target browser before deploying to production.
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Frequently Asked Questions About Inline Asset Compressor
An inline asset compressor reduces the byte size of assets embedded directly inside HTML — including inline SVGs, base64-encoded images, and JSON data blocks. Our free inline asset compressor online works entirely in your browser — your HTML is never uploaded to any server.
No. The inline asset compressor only removes whitespace, comments, and redundant characters — it never modifies the semantic content of SVGs, the pixel data of base64 images, or the data values in JSON blocks. The output HTML is functionally identical to the input. Always test in your target browser before deploying.
Absolutely. Our inline asset compressor processes everything locally in your browser. Your HTML is never uploaded to any server, never stored, and never leaves your device. This is especially important for HTML templates containing proprietary content or internal data.
Yes — 100% free, forever. No signup, no account, no premium tier, no file size limits, and no ads interrupting your workflow. Just paste your HTML, compress, and download.
Inline SVG compression typically achieves 20–50% reduction for verbose SVG icons with comments and indentation. A 2 KB formatted SVG icon can often be reduced to under 1 KB. For complex SVG illustrations with many path elements, savings are typically 15–30%.
Some tools insert line breaks every 76 characters inside base64 data (per the MIME specification for email). These line breaks are invalid in HTML data URIs and add unnecessary bytes. The inline asset compressor removes all embedded whitespace from base64 strings, producing a clean single-line data URI.
Yes. The inline asset compressor detects and minifies <script type="application/json"> and <script type="application/ld+json"> blocks using JSON.parse + JSON.stringify. A formatted 3 KB JSON-LD block typically compresses to under 800 bytes.
The HTML Compressor removes HTML whitespace, comments, and optional tags from the HTML structure itself. The inline asset compressor specifically targets the embedded assets inside HTML — SVGs, base64 images, and JSON blocks — and shows per-asset savings. For maximum compression, use both tools together.
The inline asset compressor works on HTML strings. For React JSX, paste the rendered HTML output (not the JSX source). For Vue templates, paste the compiled HTML. SVG minification is especially useful for pre-processing SVG source before converting to JSX components.