Compute the diff between two texts (a → b) — no git needed
Compute the diff between two texts (a → b) — no git needed. Returns a standard unified patch (line-oriented in both modes, applies with git apply or patch), added/removed counts, and in word mode a token-level change list for inline highlighting (capped at 2000 entries). CRLF line endings and missing trailing newlines are preserved byte-exactly. Caps: 1 MB UTF-8 per input; pathologically divergent inputs return 422 diff_too_complex.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
22 msmedian answer time
$0.002listed price per call
$0.002price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://402utils.com/v1/diff
| Category | Code and developer |
|---|---|
| Provider host | 402utils.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.002 | 22 ms |
Example input (from the provider)
{
"body": {
"a": "name: farm\nprice: 1 USDC\n",
"b": "name: farm\nprice: 2 USDC\n"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"description": "Two texts to compare, byte-exactly (no line-ending normalization).",
"properties": {
"a": {
"description": "Original text. Max 1 MB UTF-8.",
"type": "string"
},
"b": {
"description": "New text. Max 1 MB UTF-8.",
"type": "string"
},
"context": {
"description": "Unchanged context lines around each patch hunk. Default 3.",
"maximum": 10,
"minimum": 0,
"type": "integer"
},
"mode": {
"description": "Granularity of stats/changes. The patch is always a line-oriented unified diff. Default \"line\".",
"enum": [
"line",
"word"
],
"type": "string"
}
},
"required": [
"a",
"b"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"description": "Unified patch plus change statistics.",
"properties": {
"changes": {
"description": "Word mode only (omitted when identical): token runs in order, capped at 2000 entries. Unchanged runs have added=removed=false.",
"items": {
"properties": {
"added": {
"type": "boolean"
},
"removed": {
"type": "boolean"
},
"value": {
"description": "Text of the run.",
"type": "string"
}
},
"required": [
"value",
"added",
"removed"
],
"type": "object"
},
"type": "array"
},
"identical": {
"description": "True when a and b are identical; patch is then empty.",
"type": "boolean"
},
"mode": {
"description": "Echo of the requested mode.",
"enum": [
"line",
"word"
],
"type": "string"
},
"patch": {
"description": "Unified diff patch (--- a / +++ b headers). Line-oriented in both modes; empty when identical.",
"type": "string"
},
"stats": {
"description": "Counts in lines (mode line) or words (mode word).",
"properties": {
"added": {
"description": "Lines/words added in b.",
"type": "integer"
},
"removed": {
"description": "Lines/words removed from a.",
"type": "integer"
}
},
"required": [
"added",
"removed"
],
"type": "object"
},
"truncated": {
"description": "Word mode only: true when `changes` was capped at 2000 entries.",
"type": "boolean"
}
},
"required": [
"identical",
"patch",
"stats",
"mode"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}