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SnapOtter/apps/docs/tools/compress-pdf.md
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1.8 KiB

description
description
Shrink PDF file size by compressing embedded images.

Compress PDF

Reduce PDF file size by downsampling embedded images. Choose between a quality slider or a target file size.

API Endpoint

POST /api/v1/tools/compress-pdf

Accepts multipart form data with a PDF file and a JSON settings field.

Parameters

Parameter Type Required Default Description
mode string No "quality" Compression mode: quality or targetSize
quality integer No - Compression quality, 1-100 (higher = less compression). Used in quality mode
targetSizeKb number No - Target file size in kilobytes. Used in targetSize mode

Example Request

Compress by quality:

curl -X POST http://localhost:1349/api/v1/tools/compress-pdf \
  -H "Authorization: Bearer si_your-api-key" \
  -F "file=@document.pdf" \
  -F 'settings={"mode": "quality", "quality": 60}'

Compress to a target size:

curl -X POST http://localhost:1349/api/v1/tools/compress-pdf \
  -H "Authorization: Bearer si_your-api-key" \
  -F "file=@document.pdf" \
  -F 'settings={"mode": "targetSize", "targetSizeKb": 500}'

Example Response

{
  "jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/document.pdf",
  "originalSize": 5200000,
  "processedSize": 1800000
}

Notes

  • In quality mode, lower values produce smaller files with more image degradation.
  • In targetSize mode, a binary search finds the highest DPI that fits the requested size.
  • If compression would enlarge the file, the original bytes are returned unchanged.
  • Text and vector content are not affected; only embedded raster images are downsampled.