What does it cost to convert AVIF to JPEG?

$0.003 per call, paid in USDC on Base via x402.

How large can the AVIF file be?

Up to 25 MB (26,214,400 bytes). Past a limit the call answers too_large (413).

What happens if the conversion fails?

The tool answers with a typed JSON error from the errors table. Payment is settled only after the tool has produced its result; a call that fails inside the tool is never settled.

catalogue / tools / Images / AVIF to JPEG

Convert AVIF to JPEG

To convert AVIF to JPEG, send one POST to /v1/image-convert with the AVIF source and "format": "jpeg" in the body. Each call costs $0.003 in USDC on Base via x402, with no account and no API key. The source file can be up to 25 MB.

Endpoint: POST /v1/image-convert
Price: $0.003 per call
Service: image-convert
Docs: /docs/image-convert

01Limits

Limit	Value
Largest source file	25 MB (26,214,400 bytes)
Timeout	60 s
Source formats	AVIF, GIF, JPEG, PNG, SVG, TIFF, WebP
Output formats	JPEG, PNG, WebP
Option quality	default 80

02Example

A real AVIF to JPEG run of image-convert.

Request

POST /v1/image-convert
content-type: application/json
payment-signature: <base64 x402 payload>

{
  "url": "https://grist.tools/samples/images/pair-note.avif",
  "quality": 80,
  "format": "jpeg"
}

Response

200 OK
payment-response: <base64 settlement receipt>

{
  "source_url": "https://grist.tools/samples/images/pair-note.avif",
  "source_format": "avif",
  "format": "jpeg",
  "mime_type": "image/jpeg",
  "width": 556,
  "height": 100,
  "bytes": 4293,
  "image_base64": "/9j/2wBDAAYEBQYFBAYGBQYHBwYIChAKCgkJChQODwwQFxQYGBcUFhYaHSUfGhsj..."
}

Source file: images/pair-note.avif, 1 KB (1,029 bytes). Lossless AVIF of the same 556x100 raster as ocr-scan.png: two uppercase lines drawn from a hand-written 5x7 bitmap font, SAMPLE SCAN FOR OCR and SECOND LINE 2026. The request sets quality to 80. The recorded run returned 4.2 KB (4,293 bytes) of JPEG, 4.2 times the source size, with an image of 556x100 pixels. Decoded, the JPEG in image_base64 opens with FF D8 FF DB 00 43 00 06 04 05 06 05.

In the sample itself, the ftyp box names major brand avif, minor version 0 and compatible brands mif1, avif and miaf; the top-level boxes run ftyp, meta and mdat; its ispe property gives an image of 556 by 100 pixels; the primary item is coded as av01. In the returned JPEG: the start-of-image marker is followed directly by a 67-byte quantisation table segment (FF DB), with no JFIF APP0 segment in between: table 0, 8-bit precision, first quantiser value 6.

03Format notes

AVIF as a source

AVIF images live inside an ISO base-media file. Grist reads the ftyp box marker at byte four and accepts the avif or avis brand at byte eight. Without that brand test the media sniffer, which looks only for ftyp, would take the same bytes for an MP4 container. Decoding goes through the heif loader compiled into the bundled libvips, and the recorded AVIF conversion examples show a full decode through it. HEIC uses the same container family and loader but has no page here, because no real HEIC has been decoded in this project and HEVC support differs between libheif builds. AVIF reaches image-convert only, since the OCR detector has no AVIF signature. The encoder cannot write AVIF either, so the format appears purely as a source whose decoded pixels are re-encoded, with metadata dropped.

JPEG as a target

image-convert writes JPEG through sharp with options pinned around the caller's quality value. mozjpeg is off, scans are baseline rather than progressive, chroma subsampling is fixed, coding is optimised, and trellis quantisation and overshoot deringing are both disabled. Fixing these settings means the same image, format and quality produce the same bytes on a given build, instead of drifting with a libvips default. The pixel grid is not resized; only codec and container change, and the response reports the width and height of the result. Because withMetadata is never called, EXIF and similar blocks are dropped. An animated input is opened with animation off, so its first frame is the one encoded. Video frames take another road: video-thumbnail decodes one picture and hands it to ffmpeg's mjpeg encoder, which streams it out through image2pipe.

Note: JPEG has no alpha channel, so any transparency in the source is lost.

04Errors

Code	HTTP
`invalid_input`	`400`
`blocked_target`	`403`
`unreachable_target`	`424`
`upstream_timeout`	`424`
`unsupported_content_type`	`415`
`too_large`	`413`
`unprocessable`	`422`
`internal`	`500`

When each is raised, and what it means for payment: /docs/image-convert.

05Questions

What does it cost to convert AVIF to JPEG?: $0.003 per call, paid in USDC on Base via x402.
How large can the AVIF file be?: Up to 25 MB (26,214,400 bytes). Past a limit the call answers too_large (413).
What happens if the conversion fails?: The tool answers with a typed JSON error from the errors table. Payment is settled only after the tool has produced its result; a call that fails inside the tool is never settled.