glassypic

Optimize an image: smart lossy compression (typically 60-80% size reduction), optional resize/upscale/format conversion, and AI-generated SEO metadata. Accepts absolute local file paths or remote URLs. In remote/API mode, only remote URLs are supported. Supported input formats: JPG, PNG, WebP, AVIF, GIF, SVG, ICO, HEIC, TIFF, BMP (max 50 MB). Supported output formats: JPG, PNG, WebP, AVIF, GIF, SVG, ICO. Each call costs 3 credits + 1 if SEO tags enabled. Animated GIFs are processed frame-by-frame (each frame optimized individually). Cost = frames × per-frame operations. Use confirm_gif_cost: true after reviewing the cost warning. Free tier: 20 credits/day, no signup. Log in with the login tool for more credits. Use status tool to check remaining credits before batch processing.

{
  "type": "object",
  "properties": {
    "input": {
      "type": "string",
      "description": "Absolute local file path or remote URL of the image to optimize. Note: in remote/API mode, only remote URLs are supported (no local file paths). Supported inputs: JPG, PNG, WebP, AVIF, GIF (animated supported), HEIC, TIFF, BMP (max 50 MB). GlassyPic supports high-quality conversion between any input and output format."
    },
    "output_path": {
      "type": "string",
      "description": "Where to save. Accepts a file path (/tmp/out.webp) or directory ending in / (/tmp/images/). If omitted: saves next to original, named with SEO slug when SEO is enabled or .tinified suffix otherwise. URLs save to current working directory."
    },
    "output_format": {
      "type": "string",
      "enum": [
        "original",
        "jpg",
        "png",
        "webp",
        "avif",
        "gif",
        "svg",
        "ico"
      ],
      "description": "Output format. Defaults to 'original' (keep input format). Animated GIFs stay animated when output is 'gif'; converting to other formats preserves only the first frame. SVG output from raster input uses vector tracing. ICO output generates a favicon set (16, 24, 32, 48, 256px) unless a specific size is given."
    },
    "output_width_px": {
      "type": "integer",
      "exclusiveMinimum": 0,
      "description": "Target width in pixels. Set only width for proportional resize. Set both width and height for exact output dimensions (see output_resize_behavior)."
    },
    "output_height_px": {
      "type": "integer",
      "exclusiveMinimum": 0,
      "description": "Target height in pixels. Set only height for proportional resize. Set both width and height for exact output dimensions (see output_resize_behavior)."
    },
    "output_upscale_factor": {
      "type": "number",
      "enum": [
        2,
        4
      ],
      "description": "AI upscale factor: 2 (2×) or 4 (4×). Uses Real-ESRGAN for high-quality upscaling."
    },
    "output_resize_behavior": {
      "type": "string",
      "enum": [
        "pad",
        "crop"
      ],
      "description": "When both width and height are set and aspect ratio differs: 'pad' adds white padding (default), 'crop' smart-crops to fill exact dimensions"
    },
    "output_seo_tag_gen": {
      "type": "boolean",
      "description": "Generate SEO metadata (alt text, keywords, filename) and rename output file to SEO slug. Costs 1 extra credit. Default: true."
    },
    "output_file_size_limit": {
      "type": "integer",
      "exclusiveMinimum": 0,
      "description": "Target maximum output file size in bytes. The server will attempt to meet this limit through additional compression. Not guaranteed."
    },
    "confirm_gif_cost": {
      "type": "boolean",
      "description": "Set to true to proceed with animated GIF processing after seeing cost warning. Required for animated GIFs to prevent unexpected credit consumption."
    },
    "gif_frame_limit": {
      "type": "integer",
      "minimum": 1,
      "maximum": 100,
      "description": "Maximum frames to process for animated GIFs (1-100, default 100). Reduces cost by sampling fewer frames while preserving animation."
    },
    "_gif_temp_file_id": {
      "type": "string",
      "description": "Internal: temp file ID from a previous GIF cost warning. Skips re-upload."
    }
  },
  "required": [
    "input"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

{
  "type": "object",
  "properties": {
    "output_path": {
      "type": "string",
      "description": "Absolute path where the optimized file was saved"
    },
    "output_size_bytes": {
      "type": "number",
      "description": "File size of the optimized image in bytes"
    },
    "output_width_px": {
      "type": [
        "number",
        "null"
      ],
      "description": "Width of the output image in pixels"
    },
    "output_height_px": {
      "type": [
        "number",
        "null"
      ],
      "description": "Height of the output image in pixels"
    },
    "output_format": {
      "type": [
        "string",
        "null"
      ],
      "description": "Output format: jpg, png, webp, avif, or gif"
    },
    "compression_ratio": {
      "type": [
        "number",
        "null"
      ],
      "description": "Output-to-input size ratio, e.g. 0.35 means 65% smaller"
    },
    "seo_alt_text": {
      "type": [
        "string",
        "null"
      ],
      "description": "AI-generated image alt text for accessibility and SEO"
    },
    "seo_keywords": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        {
          "type": "null"
        }
      ],
      "description": "AI-generated keywords describing the image"
    },
    "seo_filename": {
      "type": [
        "string",
        "null"
      ],
      "description": "AI-generated SEO filename slug without extension"
    }
  },
  "required": [
    "output_path",
    "output_size_bytes",
    "output_width_px",
    "output_height_px",
    "output_format",
    "compression_ratio",
    "seo_alt_text",
    "seo_keywords",
    "seo_filename"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Check your GlassyPic account status: login state, tier, credits remaining, and credit reset time. Use this before batch processing to verify sufficient credits.

{
  "type": "object",
  "properties": {},
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Open the GlassyPic pricing page in your browser to upgrade your plan for more credits. Plans: Free (30/day), Pro (3,300/month), Max (12,000/month).

{
  "type": "object",
  "properties": {},
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}