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curl compare

Guide
Original (A) · Modified (B)

Structured comparison

Method
GET
Base URL (origin + path + hash)
https://api.example.com/v1/users

Query parameters

NameAB
page12
roleadminadmin

Headers

HeaderAB
Acceptapplication/jsonapplication/json
AuthorizationBearer token-aBearer token-b
Auth (-u)
— | —
Cookies (-b)
— | —
Flags (-L, -k, --compressed)
A: L=false k=false gzip=false · B: L=false k=false gzip=false

Raw line diff (full)

curl -X GET 'https://api.example.com/v1/users?role=admin&page=1' \
curl -X GET 'https://api.example.com/v1/users?role=admin&page=2' \
  -H 'Accept: application/json' \
  -H 'Authorization: Bearer token-a'  -H 'Authorization: Bearer token-b'

Guide: Compare Two curl Commands

↑ Back to tool

What is this tool?

Paste two curl commands in the left and right editors. We use the same parser as the curl → code converter to extract method, URL (base and query parameters when the URL is valid), headers, auth, cookies, and body. A Monaco diff highlights changes; structured tables and a raw line diff add detail. If either command does not parse, you still get a raw text diff of the full commands. Everything runs in your browser—nothing is uploaded. The same idea is often called a curl comparator, curl comparison tool, or side-by-side curl diff.

💡 Quick tip

Start from the structured sections (method, URL, query, headers) to spot token or env differences—then use the raw diff for odd flags or copy-paste noise.

Why compare two curl commands?

HTTP debugging often means two nearly identical requests: same endpoint, different Authorization, query params, or body. Eyeballing two long one-liners is error-prone. A dedicated curl diff surfaces what changed structurally and in the full text so you can ship fixes or document differences.

Features

  • Shared curl parser — Same logic as the curl → code tool for consistent parsing.
  • URL breakdown — Base URL and query parameters when the URL parses cleanly.
  • Structured tables — Side-by-side comparison for headers, query keys, and body where applicable.
  • Monaco diff + raw line diff — Visual diff and full-command text diff.
  • Parse fallback — Raw diff still works when structured parsing fails.
  • Client-side — Your commands stay in the browser.

How to use

  1. Paste curl A and curl B — Use the sample or your own commands from docs, DevTools, or proxies.
  2. Scan structured output — Check method, URL, query, headers, auth, cookies, and body sections for differences.
  3. Use the diff views — Monaco diff for line-level changes; raw diff for the full strings or when parsing is partial.
  4. Iterate — Edit either pane; results update as you type (debounced).

Use cases

ScenarioHow this tool helps
Docs vs realityCompare the documented curl with one copied from DevTools or a proxy.
Staging vs productionSpot header, host, or token differences between environments.
API versioningDiff two calls before updating client code or SDKs.
Security reviewVerify which headers or cookies differ between requests.

Best practices

  • Redact secrets — Treat pasted curls like live credentials; scrub tokens before sharing screenshots.
  • Trust the parser — When something looks missing in structured view, confirm with the raw diff.
  • Normalize line breaks — Heavily wrapped shells may differ only in whitespace—raw diff makes that visible.

Parser & limits

The parser covers common flags (-X, -H, -d, -u, -b, -L, -k, --compressed, and more). Unusual or rare flags may not appear in the structured view—use the raw text diff for those. You can also open landing from the Magic Box with a left-hand command pre-filled; a #data= URL fragment can load the left command.

FAQ

Is this curl compare tool free?

Yes. It runs client-side in your browser with no sign-up.

Does it support every curl flag?

Common flags are parsed into structured fields. Edge cases may only show in the raw diff; compare the full command line there.

Can I open this from the Magic Box?

Yes. When you land here from detection, the left panel can be filled from your last paste. You can also use a #data= URL fragment to load the left command.

Are my curl commands sent to a server?

No. Comparison runs in your browser.

Related terms

People often search for curl comparator, curl comparison tool, curl command comparator, compare curl commands, curl diff, curl compare online, http request compare, two curl commands, curl request diff, diff curl requests, and side by side curl. This page gives structured parsing plus text diff for both sides.

Similar tools

Other Spoold utilities that pair with curl compare:

Conclusion

Use this curl comparator (same idea as a curl comparison tool or curl command comparator) to diff two requests with structured fields and raw fallbacks. To generate code from a single curl, use the curl → code converter; for generic text, use Text Diff.