Parse RateLimit/Limit headers — limits, remaining, reset times — from any API response. Read 429s correctly before retrying — local parsing, free, no signup.
Content reviewed October 2026 · About Toolzum
Parse curl commands into method, URL, headers, and body parts for debugging. Dissect a failing Stripe call field by field — local parsing, free, no signup.
Parse cron expressions into human-readable descriptions. Includes common presets for quick reference. Presets plus plain-English schedules prevent 3am surprises — local parsing, free, no signup.
Parse Set-Cookie headers into structured JSON, or analyze cookie security flags (Secure, HttpOnly, SameSite, expiry). Flag missing Secure, HttpOnly, and SameSite attributes — free, local, no signup.
Compute turnover rate and retention with replacement-cost breakdown. Price a 20% churn problem correctly — free, local, no signup.
Read any PDF's metadata instantly — page count, size, author, creation date, encryption status. Verify a download before opening fully — local parsing, free, no signup.
IETF RateLimit (Limit/Remaining/Reset seconds) and legacy X-RateLimit-* both parse. GitHub-style (X-RateLimit-Reset epoch) converts to wait durations automatically.
Read Retry-After first (seconds or HTTP-date), else Reset timestamp. Sleep that long plus jitter — immediate retries extend bans.
Search, write, and auth endpoints carry separate buckets with different costs. Parse per-endpoint headers, never assume global.
No — parsing runs locally in your browser. Nothing leaves your device.
API Rate Limiter Calculator
Calculate rate limit windows, burst allowances, and retry intervals. Design effective rate limiting for your API endpoints.
API Gateway Rate Calculator
Calculate rate limits, burst capacities, and throttling thresholds for API gateway configurations. Plan your traffic management strategy.