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Input
Text
URL limit
8 KiB
Runtime
Browser

Compare two URLs by explicit serialization rules

Test serialized equality and inspect component differences without claiming the addresses reach one resource.

Local processingNo sign-upNo fetch or upload

Compare URLs

URL text stays in this tab. Nothing is opened or checked online.

Tool Swim does not upload, fetch, save, log, or create presets from these values.

Comparison proof

Results are inert text or JSON with the applied interpretation visible.

What this tool proves

Explicit URL interpretation

The default follows the URL Standard: parse each URL, serialize it, then compare the full serialized strings. Optional fragment exclusion and query sorting change that contract explicitly.

Textual equality cannot observe server behavior

The default follows the URL Standard: parse each URL, serialize it, then compare the full serialized strings. Optional fragment exclusion and query sorting change that contract explicitly.

The report includes both comparison strings, equality, differing components, selected options, and a permanent false marker for network-resource proof.

Private, bounded URL processing

The operation runs only after you choose it. Input stays in the current browser tab: Tool Swim does not fetch a destination, resolve DNS, test reachability, upload content, save an account preset, or invoke the developer API.

URLs are capped at 8 KiB, query text at 256 KiB, component text at 64 KiB, query lists at 2,000 pairs, each query name or value at 8 KiB, and serialized output at 1 MiB.

Primary references

Questions and answers

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