File Conversion API
Convert images, audio, and documents in a single request. Sub-50ms latency. No cold starts. Built on Rust.
Convert JPG to WebP in one request
$ curl -X POST https://qkconvert.dev/api/v1/image/convert \
-H "Authorization: Bearer sk_live_a1b2c3..." \
-F "image=@photo.jpg" \
-F 'options={"output_format":"webp","quality":85}' \
-o result.webp
# 200 OK - 38ms - 142KB -> 47KB{
"format": "webp",
"width": 800,
"height": 600,
"size_bytes": 48128,
"has_alpha": false
}Three domains.
Every format.
One subscription.
Images, audio, and documents all through one API. No SDK required.
Image Processing
Convert, resize, rotate, compress, and watermark. JPEG, PNG, WebP, AVIF, GIF, TIFF, BMP, ICO. 1 credit.
Audio Transcoding
Convert between MP3, WAV, FLAC, OGG, AAC, AIFF. Adjust bitrate, sample rate, channels. 3 credits.
PDF Processing
Merge, split, compress, extract text, create from images, or generate from plain text. 2 credits.
Data Conversion
Convert between CSV and JSON. Parse spreadsheets into structured data and back. 1 credit.
QR Code Generation
Generate QR codes as PNG or SVG from any text or URL. Customizable size and format. 1 credit.
Inspect Any File
Extract dimensions, duration, page count, format info - without converting. Fast, lightweight.
Simple, transparent pricing
Start free. No credit card required. Upgrade when ready.
- 1,000 credits / month
- 30 requests / minute
- $0.006 / overage credit
- Email support
- 5,000 credits included
- 60 requests / minute
- $0.003 / overage credit
- Email support
- 50,000 credits included
- 300 requests / minute
- $0.002 / overage credit
- Priority support
Need higher volume? Get in touch for custom limits.
Get your API key in 30 seconds
Sign up, verify your email, generate a key, start making requests.