ETag Generator
Generate a content-based ETag for conditional requests.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Use ETag Generator to assemble a spec-correct HTTP header you can paste straight into your server or CDN. It's the quick, free way to get caching, auth or content-type headers right the first time — no syntax guesswork.
About ETag Generator
Get the HTTP header right the first time. ETag Generator generate a content-based ETag for conditional requests from plain options, so you can paste a spec-correct header straight into your server, framework or CDN config. Like every ToolJolt utility it runs 100% in your browser — no sign-up, no upload, and nothing ever sent to a server, so it's safe for proprietary code and confidential data.
How to use ETag Generator
- 1Choose the options that match your use case.
- 2The correct HTTP header is assembled instantly.
- 3Copy it into your server, CDN or framework config.
- 4Adjust the options and the header updates live.
Why use ETag Generator?
- ✓Builds a spec-correct header you can paste straight in
- ✓Explains each option so you pick the right value
- ✓Copy the header (and equivalents) in one click
- ✓Avoids subtle, hard-to-debug header mistakes
Frequently asked questions
Where do I add the header from ETag Generator?+
Send it as an HTTP response (or request) header from your server, framework or CDN — Nginx, Apache, Express, Cloudflare, Vercel and others all let you set custom headers.
Why does getting this header right matter?+
Correct headers control caching, content negotiation, authentication and security behaviour. A small mistake causes stale content, broken auth or failed requests — this tool gets the syntax right for you.
Is ETag Generator free?+
Yes. ETag Generator is completely free with no sign-up, no account, no usage limits and no watermarks. Use it as often as you like.
Does ETag Generator send my data to a server?+
No. ETag Generator runs entirely in your browser with JavaScript — your input never leaves your device, which makes it safe for private API payloads, schemas and source code.
Embed ETag Generator on your website
Want ETag Generatoron your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
<iframe src="https://tooljolt.com/tools/etag-generator" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="ETag Generator — ToolJolt" loading="lazy"></iframe>