Build HTTP retry policies with exponential backoff, fixed delay, or circuit breaker strategies for resilient API clients. Code never leaves your device — formatting and validation run locally in your browser.
Content reviewed October 2026 · About Toolzum
Build a Content Security Policy header by selecting directives and allowed sources. Code never leaves your device — formatting and validation run locally in your browser.
Build HTTP requests with method, URL, headers, and body — then generate matching curl commands. Prototype endpoints without leaving the tab — local, free, no signup.
Convert Postman collections to OpenAPI 3.0 specs. Migrate your API documentation. Code never leaves your device — formatting and validation run locally in your browser.
Renders a scannable QR code from any text or URL with a client-side Reed-Solomon encoder at fixed high error correction. Customize size, colors, and center logo, then download the PNG — free, local, no signup.
Looks up bank details from an 11-character IFSC code — bank name, branch, address, city, district, and contact info. Live lookup via the Razorpay IFSC API.
Exponential backoff with jitter beats fixed delays under load.
Network errors, 429s, and 503s qualify — never 4xx client errors.
Three to five with growing delays; more hammers struggling servers.
No — building runs locally in your browser, free with no signup.
Exponential: maxRetries 3, baseDelay 1000 ms, maxDelay 30000, jitter on, statuses 408, 429, 500, 502, 503, 504. Linear: 3 retries at fixed 1000 ms with the same 6 statuses. Circuit Breaker: failureThreshold 5, resetTimeout 60000 ms (60 s), halfOpenMaxRequests 3, statuses 500, 502, 503, 504. Diagrams print waits like 1000-2000-4000 ms with 1-decimal totals.
HTTP Cache Header Generator
Generate Cache-Control directives with configurable max-age, scope, must-revalidate, and no-transform options. Code never leaves your device — formatting and validation run locally in your browser.
Webhook Retry Config
Design webhook retry policies — attempts, backoff curves, dead-letter thresholds. Stop losing events to blips — local planning, free, no signup.