CloudFront Compression Config Guide

Generate CloudFront behavior configuration for Brotli and GZIP compression with correct Cache-Control headers — no signup required. The cloudfront compression config guide produces complete cache policies, response headers policies, and distribution settings in Console steps, Terraform, CloudFormation, AWS CDK, or AWS CLI format. Supports S3, ALB, API Gateway, EC2, and custom origins. Real-time warnings for missing Accept-Encoding cache keys, missing Vary headers, and Brotli-over-HTTP issues. All generation runs in your browser.

CloudFront Compression Config Guide

Generate CloudFront behavior configuration for Brotli and GZIP compression with correct Cache-Control headers. Configure your origin type, compression settings, TTL values, and output format — generates console steps, Terraform, CloudFormation, CDK, or AWS CLI commands. All generation runs in your browser, no signup required.

Origin Type

Enable GZIP Compression

CloudFront compresses responses with GZIP for clients that send Accept-Encoding: gzip. Supported by all browsers.

Enable Brotli Compression

CloudFront compresses responses with Brotli for clients that send Accept-Encoding: br. Requires HTTPS. 15–25% better than GZIP.

Include Accept-Encoding in Cache Key

Required — CloudFront caches separate variants for gzip, br, and identity encodings.

Add Vary: Accept-Encoding Header

Tells downstream caches to store separate variants per encoding. Required for correct CDN behavior.

Enforce HTTPS (redirect HTTP)

Required for Brotli — browsers only negotiate br encoding over HTTPS.

Output Format

Console Steps — CloudFront Compression Config

# AWS CloudFront Console — Step-by-Step Configuration

## Step 1: Create or Edit CloudFront Distribution
1. Open AWS Console → CloudFront → Distributions
2. Click "Create distribution" or select an existing one → Edit

## Step 2: Configure Origin
- Origin domain: YOUR-BUCKET.s3.YOUR-REGION.amazonaws.com
- Origin access: Origin access control settings (recommended)
- Create new OAC → Sign requests → Save

## Step 3: Configure Default Cache Behavior
- Viewer protocol policy: Redirect HTTP to HTTPS
- Allowed HTTP methods: GET, HEAD
- Compress objects automatically: Yes ← REQUIRED for compression

## Step 4: Create Cache Policy
1. CloudFront → Policies → Cache → Create cache policy
- Name: CompressionCachePolicy
- Default TTL: 86400 seconds (1d)
- Maximum TTL: 31536000 seconds (52w)
- Minimum TTL: 0 seconds
- Cache key settings:
  ✓ Enable Accept-Encoding for Gzip: Yes
  ✓ Enable Accept-Encoding for Brotli: Yes
  Headers: None
  Cookies: None
  Query strings: None (or as needed)

## Step 5: Create Response Headers Policy
1. CloudFront → Policies → Response headers → Create response headers policy
- Name: CompressionResponseHeaders
- Custom headers:
  Header: Vary
  Value: Accept-Encoding
  Override: No
- Security headers: Enable recommended security headers

## Step 6: Attach Policies to Behavior
- Cache policy: CompressionCachePolicy (created above)
- Response headers policy: CompressionResponseHeaders (created above)
- Origin request policy: CORS-S3Origin (for S3) or None

## Step 7: Deploy and Verify
- Click "Save changes" → Wait for distribution to deploy (Status: Deployed)
- Test: curl -H "Accept-Encoding: gzip" -I https://YOUR-CLOUDFRONT-DOMAIN/app.js
- Expected: Content-Encoding: gzip, X-Cache: Hit from cloudfront (2nd request)

Verification Commands

Verify GZIP

curl -H "Accept-Encoding: gzip" -I https://YOUR-CF-DOMAIN/app.js
# Expected: Content-Encoding: gzip

Verify Brotli

curl -H "Accept-Encoding: br" -I https://YOUR-CF-DOMAIN/app.js
# Expected: Content-Encoding: br

Check cache hit

curl -H "Accept-Encoding: gzip" -I https://YOUR-CF-DOMAIN/app.js
# 2nd request: X-Cache: Hit from cloudfront

Why Use Our CloudFront Compression Config Guide?

Instant CloudFront Compression Config Generation

Generate complete CloudFront compression configuration instantly — the cloudfront compression config guide produces console steps, Terraform, CloudFormation, CDK, and AWS CLI commands with correct cache policies, response headers policies, and Brotli/GZIP settings.

Secure CloudFront Compression Config Guide Online

All configuration generation runs entirely in your browser. The cloudfront compression config guide never sends your settings to any server — safe for generating configs for private distributions, internal APIs, and proprietary CloudFront setups.

5 IaC Formats + Real-Time Misconfiguration Warnings

Generate CloudFront compression config in Console steps, Terraform, CloudFormation, AWS CDK, or AWS CLI format — all from the same options. The cloudfront compression config guide shows real-time warnings for missing Accept-Encoding cache keys, missing Vary headers, and Brotli-over-HTTP issues.

100% Free Forever

The cloudfront compression config guide is completely free with no signup, no premium tier, no limits, and no ads. Generate CloudFront compression configurations for unlimited distributions at zero cost, forever.

Common Use Cases for CloudFront Compression Config Guide

S3 Static Site Compression Setup

Configure CloudFront to serve GZIP and Brotli compressed static assets from an S3 bucket — the cloudfront compression config guide generates the correct cache policy with Accept-Encoding in the cache key, ensuring CloudFront caches separate variants for each encoding.

API Gateway Response Compression

Enable CloudFront compression for API Gateway origins — the cloudfront compression config guide generates the correct behavior configuration with Brotli and GZIP enabled, correct TTL settings for API responses, and Vary: Accept-Encoding response headers.

Brotli Compression Enablement

Enable Brotli compression on CloudFront distributions that currently only use GZIP — the cloudfront compression config guide shows the exact cache policy settings needed to add Brotli support without breaking existing GZIP caching behavior.

Infrastructure-as-Code Migration

Generate Terraform, CloudFormation, or CDK code for CloudFront compression configuration — the cloudfront compression config guide produces production-ready IaC code that can be added directly to your existing infrastructure repository.

Cache Policy Optimization

Configure CloudFront cache policies with correct TTL values for different asset types — the cloudfront compression config guide helps you set Default TTL, Maximum TTL, and Minimum TTL correctly for static assets, HTML pages, and API responses.

CloudFront Distribution Audit

Audit an existing CloudFront distribution for compression misconfigurations — the cloudfront compression config guide shows the correct settings and generates verification curl commands to confirm GZIP and Brotli are working correctly.

Understanding CloudFront Compression Configuration

What is CloudFront Compression Configuration?

AWS CloudFront can compress HTTP responses using GZIP and Brotli before delivering them to clients — reducing transfer size by 60–85% for text-based assets (HTML, CSS, JavaScript, JSON). Correct CloudFront compression configuration requires three components working together: (1) Compress objects automatically enabled on the cache behavior, (2) a cache policy that includesAccept-Encoding in the cache key so CloudFront stores separate compressed variants, and (3) a response headers policy that adds Vary: Accept-Encoding so downstream caches handle encoding variants correctly. Our cloudfront compression config guide generates all three components in your chosen IaC format.

How Our CloudFront Compression Config Guide Works

1Select your origin type and compression settings: Choose your origin (S3, ALB, API Gateway, EC2, or custom), enable GZIP and/or Brotli, configure TTL values, and toggle Vary header and HTTPS enforcement. The cloudfront compression config guide updates the generated config instantly and shows warnings for misconfigurations.
2Choose your output format: Select Console Steps for manual setup, Terraform for IaC, CloudFormation for AWS-native IaC, CDK for TypeScript infrastructure code, or AWS CLI for command-line deployment. All formats generate complete, production-ready configuration. Your settings never leave your browser.
3Copy and deploy: Copy the generated configuration with one click and apply it to your CloudFront distribution. Use the built-in verification curl commands to confirm GZIP and Brotli are working correctly and check the X-Cache header to verify cache hit behavior.

Key CloudFront Compression Settings

Compress objects automatically: The master switch for CloudFront compression — must be set to true on the cache behavior. CloudFront only compresses objects ≥1000 bytes with supported Content-Type headers. Objects with Content-Encoding already set are passed through without re-compression.
Cache policy — Accept-Encoding in cache key: The most critical setting — EnableAcceptEncodingGzip: true andEnableAcceptEncodingBrotli: true tell CloudFront to cache separate variants for each encoding. Without this, CloudFront caches only one variant and may serve the wrong encoding to clients.
Response headers policy — Vary: Accept-Encoding: AddsVary: Accept-Encoding to all responses, telling browsers and intermediate caches to store separate variants per encoding. Required for correct behavior when CloudFront is behind another CDN or proxy.
Brotli requires HTTPS: Browsers only sendAccept-Encoding: br over HTTPS connections. HTTP connections will only receive GZIP or uncompressed responses. Always enableredirect-to-https viewer protocol policy when using Brotli.

CloudFront Compression vs Origin Compression

CloudFront supports two compression modes: automatic compression (CloudFront compresses on-the-fly) and pre-compressed assets (origin serves files with Content-Encoding already set). For dynamic API responses, automatic compression is the only option. For static assets (JS, CSS, HTML), pre-compressing at build time and uploading to S3 withContent-Encoding: gzip or Content-Encoding: bris more efficient — it eliminates CloudFront's compression CPU overhead and allows using higher compression levels (GZIP level 9, Brotli level 11). The cloudfront compression config guide generates correct configuration for both modes.

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Frequently Asked Questions About CloudFront Compression Config Guide

The cloudfront compression config guide generates complete CloudFront behavior configuration for Brotli and GZIP compression — including cache policies, response headers policies, and correct Cache-Control headers. Our free cloudfront compression config guide online produces console steps, Terraform, CloudFormation, CDK, and AWS CLI output. All generation runs in your browser with no signup required.

Yes. CloudFront supports Brotli compression when "Compress objects automatically" is enabled and the cache policy includes EnableAcceptEncodingBrotli: true. CloudFront serves Brotli to clients that send Accept-Encoding: br (all modern browsers over HTTPS) and automatically falls back to GZIP for older clients.

Yes. All configuration generation runs entirely in your browser using JavaScript. No configuration data is sent to any server, stored remotely, or transmitted over the network — safe for generating configs for private distributions and internal APIs.

Yes — 100% free, forever. No signup, no account, no premium tier, no limits, and no ads. Generate CloudFront compression configurations for unlimited distributions at zero cost.

Without Accept-Encoding in the cache key, CloudFront caches only one variant of each object — either compressed or uncompressed. If a compressed variant is cached first, CloudFront will serve it to clients that do not support compression, causing a broken download. EnableAcceptEncodingGzip and EnableAcceptEncodingBrotli in the cache policy fix this.

CloudFront only compresses objects that are at least 1,000 bytes (1 KB). Objects smaller than 1 KB are served uncompressed because the GZIP/Brotli header overhead would make them larger. Objects with Content-Encoding already set by the origin are passed through without re-compression.

For static assets (JS, CSS, HTML) served from S3, pre-compressing at build time is more efficient — it eliminates CloudFront compression CPU overhead and allows using higher compression levels (GZIP level 9, Brotli level 11). For dynamic API responses, CloudFront automatic compression is the only option.

Browsers only send Accept-Encoding: br over HTTPS connections — this is a browser security decision to prevent compression-based attacks (BREACH) on HTTP. HTTP connections will only receive GZIP or uncompressed responses. Always enable redirect-to-https viewer protocol policy when using Brotli.

Use curl: curl -H "Accept-Encoding: gzip" -I https://YOUR-CF-DOMAIN/app.js. Look for Content-Encoding: gzip and Vary: Accept-Encoding in the response. Check X-Cache: Hit from cloudfront on the second request to confirm caching is working. For Brotli, use Accept-Encoding: br and look for Content-Encoding: br.