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Limits


Last updated Jul 28, 2026|Copy as Markdown|View as Markdown|Agent setup

OverviewAccount plan limitsRequest and response limitsCPU timeMemoryDurationDaily requestsSubrequests Worker-to-Worker subrequestsSimultaneous open connectionsEnvironment variablesWorker sizeWorker startup timeNumber of WorkersRoutes and domains Routes with wrangler dev --remote/* routes-remote-dev */Cache API limitsLog sizeImage Resizing with WorkersStatic AssetsUnbound and Bundled plan limitsWall time limits by invocation typeRelated resources





Account plan limits

Feature	Workers Free	Workers Paid
Requests	100,000/day	No limit
CPU time	10 ms	5 min
Memory	128 MB	128 MB
Subrequests	50/request	10,000/request
Simultaneous outgoing connections/request	6	6
Environment variables	64/Worker	128/Worker
Environment variable size	5 KB	5 KB
Worker size	3 MB	10 MB
Worker startup time	1 second	1 second
Number of Workers1	100	500
Number of Cron Triggers per account	5	250
Number of Static Asset files per Worker version	20,000	100,000
Individual Static Asset file size	25 MiB	25 MiB

1 If you reach this limit, consider using Workers for Platforms.


Need a higher limit?


To request an adjustment to a limit, complete the Limit Increase Request Form ↗. If the limit can be increased, Cloudflare will contact you with next steps.



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Request and response limits

Limit	Value
URL size	16 KB
Request header size	128 KB (total)
Response header size	128 KB (total)
Response body size	No enforced limit

Request body size limits depend on your Cloudflare account plan, not your Workers plan. Requests exceeding these limits return a 413 Request entity too large error.

Cloudflare Plan	Maximum request body size
Free	100 MB
Pro	100 MB
Business	200 MB
Enterprise	500 MB (by default)

Enterprise customers can contact their account team or Cloudflare Support for a higher request body limit.

Cloudflare does not enforce response body size limits. CDN cache limits apply: 512 MB for Free, Pro, and Business plans, and 5 GB for Enterprise.

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CPU time


CPU time measures how long the CPU spends executing your Worker code. Waiting on network requests (such as fetch() calls, KV reads, or database queries) does not count toward CPU time.

Limit	Workers Free	Workers Paid
CPU time per HTTP request	10 ms	5 min (default: 30 seconds)
CPU time per Cron Trigger	10 ms	30 seconds (< 1 hour interval) 15 min (>= 1 hour interval)

Most Workers consume very little CPU time. The average Worker uses approximately 2.2 ms per request. Heavier workloads that handle authentication, server-side rendering, or parse large payloads typically use 10-20 ms.

Each isolate has some built-in flexibility to allow for cases where your Worker infrequently runs over the configured limit. If your Worker starts hitting the limit consistently, its execution will be terminated according to the limit configured.
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