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AI Image Upscaler

Model:
Take a small or low-res image up to 2× or 4× its original resolution. Ideal for printing iPhone shots, rescuing old profile pics, enlarging AI art, or prepping product photos for a billboard. We read your image dimensions after upload and show the exact output size before you hit upscale.

Drag & drop your image here

or click to browse

JPG PNG WebP

Up to 10MB

Uploaded preview
Input: — Output: — — —
Standard runs on our GPU and is free within your daily pool. Topaz rebuilds per-pixel detail — best for print.
Output is cached as PNG. 4× results are 4× the pixels (16× the area) — plan for a larger file.
Token estimate
—
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Upload an image to see the exact output dimensions and cost.
Upscaled result
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What you can upscale

Prep photos for print

A 1080p iPhone shot is only ~3.5\

Push to 4K / Retina

Old 720p / 1080p content made sharp for 4K monitors and Retina displays.

Scale up AI art

Blow SDXL / FLUX outputs up from 1024px to 4K without losing coherence.

Rescue tiny thumbnails

Old avatars, ebay thumbnails, and forum attachments pushed to usable sizes.

Product photos

Amazon wants 1600px+ for zoom. Upscale low-res manufacturer photos in one click.

Scanned documents

Old photocopies and faxed docs brought up to OCR-readable resolution.

How to upscale 2× or 4×

Upload your image

JPG, PNG, or WebP up to 10MB. We read the dimensions automatically and show the projected output size.

Pick scale + model

2× for display, 4× for print. Standard is free-pool. Topaz and Ideogram rebuild more detail for premium quality.

Upscale

We rebuild every pixel. Standard runs in ~5s. 4× Topaz on a large image can take ~30s.

Download at new resolution

PNG output at the new resolution. No watermark. Share or save to your dashboard.

Free.ai vs. other upscalers

Free.aiTopaz GigapixelLet's EnhanceWaifu2x
Starting costFree pool, no sign-up$99 one-off$9–$34/moFree
ModelsReal-ESRGAN + Topaz + Ideogram + Clarity + AuraSR + CCSRTopaz proprietaryUndisclosedWaifu2x CUNet
Max scale4× (Topaz supports 6× input)6×4×2×
Install required?No — browser onlyYes, desktop appNoNo
API?Yes, free-tier—Paid—

Related tools: Quality enhance (same resolution) · Unblur · Restore old photo · Video upscaler

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Want better results? Premium models (GPT-5, Claude, Gemini) deliver higher quality. View Plans

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Upscale images 2x or 4x with AI. Standard Real-ESRGAN free-pool, plus premium Topaz Image Upscale, ESRGAN, and Ideogram Upscale for true resolution rebuild.

How to Use AI Image Upscaler

1
Enter your input

Type text, upload a file, or describe what you want. No account needed.

2
Click generate

Our AI processes your request in seconds using the best open-source models.

3
Download & share

Download, copy, or share your result. Free for personal and commercial use.

Use this tool via API

Automate this tool from your own code. OpenAI-compatible REST endpoint, Bearer-token auth, no extra SDK required. Token costs match the web interface.

API Documentation Get API Key 
curl -X POST https://api.free.ai/v1/image/generate/ \
  -H "Authorization: Bearer sk-free-..." \
  -H "Content-Type: application/json" \
  -d '{"prompt": "A sunset over mountains", "model": "sdxl"}'

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AI Image Upscaler — FAQ

True 2× or 4× resolution upscale. We rebuild every pixel — the output genuinely has more detail than a simple resize. Ideal for print, Retina displays, and pushing AI art beyond 1024px.

Upscaler changes resolution (input × 2 or × 4). Enhance (at /image/enhance/) keeps the same resolution and just improves quality. Pick Upscaler when you need a bigger file.

Standard (Real-ESRGAN, free-pool), Topaz Image Upscale (rebuilds every pixel — best for print), Ideogram Upscale (creative detail), plus ESRGAN, AuraSR, Clarity, and CCSR.

Per-image flat regardless of scale — Standard ~1,000 tokens, Topaz ~90,000. Scale affects the output size, not the cost.

Yes. We read the input dimensions the moment you upload and show the exact output resolution (input W × scale, input H × scale) before you click upscale.

Standard runs in ~5 seconds. Topaz 4× on a large image (3000px+) can take 25–45 seconds — we show the heavy-task banner and let you close the tab; the result lands in your dashboard.

Up to 10MB input. Very large inputs at 4× produce very large outputs — plan for a 15–30MB PNG at 4× from a 2048px source.

Yes — one of the most popular use cases. SDXL outputs at 1024px upscale cleanly to 4K with Topaz or Ideogram.

Gigapixel is a $99 desktop app limited to Topaz models. Our upscaler includes Topaz as one option plus 6 alternatives, and has a free-pool tier.

No. Standard upscale (Real-ESRGAN) is free within the daily pool.

Yes — /batch/ runs the same settings across many images.

Yes. POST multipart to /v1/image/upscale/ with `image`, `model`, and `scale` (2 or 4). GET /v1/image/upscale-quote/ returns the exact token cost and projected output dimensions for a given image.

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