ButterflyAPIAI image tools for
developers and creators
Ten production-ready AI tools covering image generation, editing, processing, and document conversion. Use them in the browser with no code, or integrate via REST API in minutes.
Text to Image
Most popularImage GenerationGenerate any image from words
Type a description and get a photorealistic, artistic, or illustrated image in seconds. Supports detailed prompts including style, lighting, camera angle, and mood. Powered by state-of-the-art diffusion models.
Use cases
- Product concept art
- Social media visuals
- Blog illustrations
- Marketing assets
Specs
- Any style or genre
- Multiple aspect ratios
- Up to 1024×1024px
- Result in ~8s
Image to Image
Image GenerationTransform photos with a prompt
Upload any image and describe the change you want — alter the style, season, lighting, subject, or mood. The AI preserves the structure of your original while applying the transformation.
Use cases
- Season/weather changes
- Style transfer
- Product recolours
- Scene editing
Specs
- Supports JPG, PNG, WebP
- Preserves composition
- Prompt-guided output
- Result in ~10s
Background Removal
No-code friendlyImage ProcessingPixel-perfect cutouts instantly
Remove the background from any photo with clean, accurate edges — including hair, fur, and complex shapes. Returns a transparent PNG ready for compositing, print, or web use.
Use cases
- Product photography
- Profile photos
- E-commerce listings
- Marketing materials
Specs
- Transparent PNG output
- Hair and fur accurate
- Supports up to 10MB
- Result in ~3s
Image Upscaler
Image Processing4x resolution without quality loss
Enlarge images up to 4× using AI super-resolution. Recovers fine detail, sharpens edges, and improves texture — without the blur you get from basic resizing.
Use cases
- Print-ready assets
- Old photo restoration
- Thumbnail to hero image
- Low-res product shots
Specs
- Up to 4× upscale
- Preserves text and edges
- JPG / PNG input
- Result in ~6s
Cartoon Generator
TrendingImage GenerationTurn photos into illustrated art
Convert any photo into a cartoon, comic, anime, or illustrated style. Works great for avatars, merchandise, social content, and creative campaigns. Consistent, high-quality output every time.
Use cases
- Profile avatars
- Social media posts
- Brand mascots
- Merchandise design
Specs
- Multiple cartoon styles
- Preserves likeness
- Clean vector-like edges
- Result in ~12s
Face Restore
Image ProcessingRestore blurry or damaged portraits
Enhance old, blurry, or low-resolution face photos using AI. Adds sharp detail to eyes, skin, and hair without distorting the original likeness. Works on historic photos and modern shots alike.
Use cases
- Old family photos
- Low-light portraits
- Scanned documents
- CCTV enhancement
Specs
- Works on grayscale
- Preserves identity
- Multiple faces
- Result in ~5s
Image Enhance
Image ProcessingFix exposure, colour, and sharpness
Automatically improve the overall quality of any image — corrects exposure, white balance, contrast, and sharpness in one pass. No sliders, no settings, just a better photo.
Use cases
- Product shot retouching
- Social media polish
- Real estate photos
- Batch image cleanup
Specs
- Fully automatic
- Supports RAW previews
- JPG / PNG / WebP
- Result in ~4s
Watermark
Image ProcessingProtect or brand images at scale
Add text or image watermarks to photos programmatically. Control position, opacity, size, and rotation. Designed for high-volume API usage — brand thousands of images in seconds.
Use cases
- Stock photo protection
- Brand imagery
- PDF previews
- Bulk asset stamping
Specs
- Text or image mark
- Custom position/opacity
- Synchronous — instant
- Batch via API
Image Caption
Text & DataAuto-describe any image
Generate accurate, descriptive natural-language captions for any image. Useful for accessibility (alt text), content indexing, moderation pipelines, and SEO image metadata.
Use cases
- Alt text generation
- Content moderation
- Image search indexing
- CMS auto-tagging
Specs
- Natural language output
- Multi-object scene
- English output
- Result in ~2s
HTML to PDF
DocumentConvert any page to a perfect PDF
Render any HTML, URL, or template to a pixel-perfect PDF via API. Supports custom page sizes, margins, headers, footers, and full CSS/JavaScript execution — including charts and dynamic content.
Use cases
- Invoice generation
- Report exports
- Contract PDFs
- Screenshot-to-PDF pipelines
Specs
- Full CSS & JS render
- Custom headers/footers
- A4, Letter, custom sizes
- Synchronous
Built for production
The same infrastructure used in the no-code Studio is available as a REST API — battle-tested and ready to scale.
Results in seconds
Most tools return results in under 10 seconds. The platform is built for speed — no queues, no waiting.
Simple REST API
One endpoint per tool. Send an image or prompt, get back a URL. Works with any language or framework.
No-code Studio
Every tool is available in the browser — no code, no API key, no setup. Just upload and go.
Pay per use
Credits never expire. Pay only for what you use. From £0.009 per credit on the Business plan.
Your data stays private
Uploaded images are processed and immediately deleted. Nothing is stored or used for training.
Scale to millions
The same API that powers the Studio handles thousands of requests per minute. No throttling on paid plans.
Integrate in under 5 minutes
All tools share the same API structure — one auth header, one endpoint format, one response shape. Works with Node.js, Python, PHP, Ruby, or any HTTP client.
Common questions
Do I need to code to use these tools?
No. Every tool is available in the no-code Studio at butterflyapi.com/app. Just sign up, upload your image or enter your prompt, and download the result.
How are credits charged?
Each tool costs a fixed number of credits per call (shown above). Credits are deducted when a job completes. You get 100 free on signup. Top up with a one-time pack or monthly subscription.
What image formats are supported?
JPG, PNG, and WebP inputs are supported across all image tools. Outputs are always JPG or PNG depending on the tool (background removal always returns transparent PNG).
Is my data private?
Yes. Uploaded images are processed and deleted immediately. Nothing is retained, logged beyond job records, or used for model training.
Can I use the API for commercial projects?
Yes — all plans including free include commercial usage rights. You own the output of every generation.
What is the rate limit?
The free tier allows up to 5 concurrent requests. Pro and Business plans have higher concurrency limits. Contact us for dedicated throughput.
Start with 100 free credits
No credit card required. Enough to run dozens of image generations or several background removals.