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GIF Compressor

Compress GIF images and animations to reduce file size. Supports both static and animated GIFs.

Try GIF compression in the browser →

Compress.FAST uses this same API — what you see in the browser is what you get in code.

Quick reference

Job typeimage.gif-compress
Categoryimages
EndpointPOST /compress/gif
Input formats.gif
Output formatsame as input
Costing1 credit per 5 MB
Max file size1 GB
Optionsresize

Example

cURL
# 1) submit
JOB_ID=$(curl -sS -X POST "https://api.tools.fast/compress" \
  -H "X-Fast-Api-Key: $API_KEY" \
  -F "file=@animation.gif" | jq -r '.id')

# 2) poll until complete
while true; do
  STATUS=$(curl -sS "https://api.tools.fast/compress/job/${JOB_ID}" \
    -H "X-Fast-Api-Key: $API_KEY" | jq -r '.status')
  [ "${STATUS}" = "Succeeded" ] && break
  [ "${STATUS}" = "Failed" ] || [ "${STATUS}" = "Canceled" ] && exit 1
  sleep 1
done

# 3) download
curl -sS "https://api.tools.fast/compress/job/${JOB_ID}/download" \
  -H "X-Fast-Api-Key: $API_KEY" \
  -o "animation-compressed.gif"
C#
using var http = new HttpClient();
http.DefaultRequestHeaders.Add("X-Fast-Api-Key", "fast_prod_your_key_here");

using var form = new MultipartFormDataContent();
form.Add(new ByteArrayContent(File.ReadAllBytes("animation.gif")), "file", "animation.gif");

var submit = await http.PostAsync("https://api.tools.fast/compress", form);
var job = await submit.Content.ReadFromJsonAsync<JsonElement>();
var jobId = job.GetProperty("id").GetString();

string status;
do
{
    await Task.Delay(1000);
    var poll = await http.GetFromJsonAsync<JsonElement>(
        $"https://api.tools.fast/compress/job/{jobId}");
    status = poll.GetProperty("status").GetString()!;
} while (status is "Queued" or "Running");

var output = await http.GetByteArrayAsync(
    $"https://api.tools.fast/compress/job/{jobId}/download");
File.WriteAllBytes("animation-compressed.gif", output);
PowerShell
$headers = @{ "X-Fast-Api-Key" = "fast_prod_your_key_here" }

# 1) submit
$job = Invoke-RestMethod -Method Post "https://api.tools.fast/compress" `
  -Headers $headers `
  -Form @{ file = Get-Item "animation.gif" }

# 2) poll until complete
do {
  $status = (Invoke-RestMethod "https://api.tools.fast/compress/job/$($job.id)" `
    -Headers $headers).status
  if ($status -in "Failed", "Canceled") { throw "Job $($job.id) $status" }
  Start-Sleep -Seconds 1
} while ($status -ne "Succeeded")

# 3) download
Invoke-RestMethod "https://api.tools.fast/compress/job/$($job.id)/download" `
  -Headers $headers -OutFile "animation-compressed.gif"

Options

The GIF compressor supports resize -- scale down images and animations while compressing. See Options for the full resize reference.

cURL
# compress + resize to 720p
curl -sS -X POST "https://api.tools.fast/compress" \
  -H "X-Fast-Api-Key: $API_KEY" \
  -F "file=@animation.gif" \
  -F 'options={"_schemaVersion":1,"resize":{"enabled":true,"preset":"720p","mode":"pixels","value":null}}'
C#
using var form = new MultipartFormDataContent();
form.Add(new ByteArrayContent(File.ReadAllBytes("animation.gif")), "file", "animation.gif");
form.Add(new StringContent(
    """{"_schemaVersion":1,"resize":{"enabled":true,"preset":"720p","mode":"pixels","value":null}}"""),
    "options");

var response = await http.PostAsync("https://api.tools.fast/compress", form);
PowerShell
Invoke-RestMethod -Method Post "https://api.tools.fast/compress" `
  -Headers @{ "X-Fast-Api-Key" = $Key } `
  -Form @{
    file    = Get-Item "animation.gif"
    options = '{"_schemaVersion":1,"resize":{"enabled":true,"preset":"720p","mode":"pixels","value":null}}'
  }

Notes

  • Output format: .gif -- same as input.
  • Animation frames and timing are preserved during compression.
  • The compressor optimizes the color palette and frame data to reduce file size.
  • For static GIF images, consider converting to PNG or WebP for better compression ratios (use Convert.FAST for format conversion).
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