Minify XML Online — Free XML Compressor
Minify XML documents instantly — select, reorder, concatenate and minify multiple .xml files as one bundle with your current options. CDATA sections and processing instructions are preserved while everything stays in your browser.
Features
Remove whitespace, comments and unnecessary formatting from XML documents to reduce file size while preserving CDATA sections and processing instructions.
Remove whitespace, comments and unnecessary formatting from XML documents to reduce file size while preserving CDATA sections and processing instructions.
Basic example
Input XML
Minified XML
Minification options
Comparison with/without option:
Original code
With removeComments: true
With removeComments: false
Comparison with/without option:
Original code
With collapseWhitespace: true
With collapseWhitespace: false
XML conversion helpers now have dedicated URLs
Use standalone flows for interoperability: jump to XML → JSON, XML → YAML or XML → CSV while keeping XML minification and beautification centered on FastMinify’s primary XML formatter.
XML Formatting and Beautification
Proper XML formatting makes documents easier to read, debug and maintain. Our formatter adds consistent indentation, aligns attributes, and organizes elements hierarchically. This is especially useful for configuration files (web.xml, pom.xml), SOAP responses, and XML data feeds.
Minifying XML Sitemaps
XML sitemaps can grow large for sites with thousands of pages. Minifying your sitemap.xml removes unnecessary whitespace and comments, reducing file size and improving crawl efficiency. Our tool handles sitemap-specific elements like loc, lastmod, changefreq and priority correctly.
Concatenating XML Files
On Minify XML, select or drop multiple .xml files, reorder them, then concatenate and minify the complete bundle once with your current options. Processing stays in your browser. Optional file markers, comments and extra spacing are added before minification and may be removed from the final output. Concatenating multiple full XML documents may leave duplicate <?xml prologs or namespace collisions — review the bundle before deploy.
Frequently Asked Questions — Minify
Everything about minification
Why minify XML?
XML minification removes whitespace and comments while preserving CDATA sections and processing instructions.
Need to unminify XML?
Use our XML unminifier for audits and debugging.
Need to beautify XML?
Use our XML beautifier for consistent indentation.
How do I concatenate and minify multiple XML files?
On Minify XML, use the concat button or drop two or more .xml files on the input panel, reorder them, then concatenate and minify the complete bundle once with your current options. Everything runs in your browser. This workflow is not available on Beautify XML or Unminify XML. File markers and comments may be removed during minification. If you merge full XML documents, watch for duplicate <?xml prologs and namespace collisions — review the output before deploy.
Verify it yourself
FastMinify processes your input in the browser. Inspect the network panel or read our validation gate to confirm nothing leaves your device.
Minify
Shrink code and assets for production — minify JavaScript, CSS, HTML, JSON and XML before gzip or CDN deploy.
Explore other tool categories
Beautify
Make code readable with consistent indentation — beautify JavaScript, CSS, TypeScript, SCSS, LESS, Markdown, GraphQL, SQL, YAML and more in your browser.
Unminify
Expand minified or compressed code — unminify JavaScript, CSS, TypeScript, SCSS, LESS, SQL, YAML and other formats when debugging or reviewing.
Conversion
Transform data between JSON, YAML, XML and CSV locally — no server uploads.
CSS preprocessors
Compile SCSS or LESS to standard CSS in the browser — pair with beautify or minify for a full stylesheet workflow.
JSON Tools
Validate, format, diff and explore JSON payloads — complementary to minifiers and converters.
SVG Tools
Preview, optimize with SVGO, export Data URI, resize, beautify, convert to JSX and validate SVG — all in your browser.
DevOps & Infra
Terraform HCL format/validate/minify, Dockerfile format & lint, Docker Compose and .env validation.
CI/CD
GitHub Actions and GitLab CI — format YAML and check workflow/job structure in your browser.
Logs & observability
Line-oriented JSON/NDJSON and Nginx/Apache access logs — format, filter, validate, and CSV/TSV.
Kubernetes
Multi-doc manifests, structural validate, Ingress/Deployment starters, and Helm values formatting.
Networking / IP
CIDR, subnets, and IPv4/IPv6 helpers — in your browser.
Security & tokens
JWKS, X.509 certificates, and secrets scan — browser-local.
API & schemas
OpenAPI tools to format, validate, and lint your specs.
HTTP Tools
Paste-local cURL, HTTP messages, and URLs — format and inspect in your browser, never sent.
Encoding
Encode or decode Base64, URL components and HTML entities — client-side only.
Developer utilities
Timestamps, UUID, ULID, Nanoid, cron, passwords, regex, slugify, number bases, case, text diff, and chmod — all client-side.
Text & Markdown
Count words, build Markdown TOCs, and clean line lists — all in your browser.
AI & LLM
Token counting, pricing estimates, and context-window fit — 100% browser-local.
Test Data
Synthetic field values for fixtures and DB seed — reserved-range phone numbers first.
Serialization
Serialize and deserialize PHP data structures beside JSON workflows.