Convert PNG to ICO Online — For Windows Icons & Favicons

Generates 6 resolution layers (16/32/48/64/128/256px) with perfect transparency.

Drop up to 50 files at once — no install, no sign-up required.

Drop PNG Files Here

50 MB per file Up to 50 files 3 parallel conversions 1 credit per 5 MB

Encrypted EU Servers Auto-delete 1h

⚡ Median PNG → ICO time (last 10k jobs): 113ms

Resize: OffMetadata: Strip

How it works

1 · Drop your files
Drag & drop or choose PNG files. Upload 256×256px resolution PNG for best results. No account required on Free—paid plans unlock bigger batches, higher limits, and priority queues.
2 · We convert securely
Processed on our dedicated servers. Encrypted in transit & at rest. We never store filenames—only file types & sizes for accounting. We never train AI models on uploads.
3 · Download & auto-delete
Grab your ICO in seconds. Files delete automatically after 1 hour. Delete anytime after downloading with one click.

About PNG →

PNG (Portable Network Graphics) provides lossless compression with full alpha channel transparency, making it the go-to format for graphics, screenshots, and images requiring pixel-perfect fidelity. Created in 1996 as a patent-free GIF alternative, PNG uses DEFLATE compression and supports both indexed color (PNG-8) and truecolor with alpha (PNG-24/32). Files are 3-10× larger than equivalent JPEGs but preserve every pixel exactly.

Learn more: PNG on Wikipedia

PNG is universally supported and ideal for logos, UI elements, diagrams, and any content where transparency or lossless editing matters. For photographic content without transparency needs, JPEG typically offers better compression efficiency.

About ICO

ICO is the standard format for website favicons—the small icons shown in browser tabs, bookmarks, and address bars. An ICO file can bundle multiple resolutions (16×16 up to 256×256 pixels) so browsers choose the best size for each context. Modern ICO files store images as PNG internally, preserving full transparency and sharp edges.

Learn more: ICO on Wikipedia

Originally created by Microsoft for Windows application icons, ICO remains the most widely supported favicon format across all browsers. While newer options like SVG favicons exist, ICO guarantees compatibility with every browser and platform.

Frequently Asked Questions

Do you preserve transparency?

Yes. All six layers (16px, 32px, 48px, 64px, 128px, 256px) are encoded as 32-bit RGBA PNG inside the ICO container, preserving full alpha channel transparency.

What if my PNG isn't square?

We center-crop rectangular images to a square before generating all six resolutions. This avoids distortion and ensures your icon looks correct in Windows. If you need precise control over cropping, prepare a square PNG at 256×256 or larger before uploading.

What's the recommended input size?

Upload at least 256×256 for best quality across all ICO layers. Smaller PNGs will be upscaled automatically, but may appear less sharp. Higher resolution source images (512×512 or larger) work great—we'll downsample cleanly to the 6 standard sizes.

Can I use ICO files for website favicons?

Yes. ICO remains the most compatible favicon format, especially for older browsers and Windows desktop shortcuts. Modern browsers also support PNG and SVG, but ICO ensures universal compatibility. Upload your ICO as favicon.ico in your website root.

What are the limits for this converter?

Tier	Max File Size	Max Files/Batch	Parallel Processing
Guest/Free	50 MB	50 files	3 at once
Pro	1024 MB	1000 files	6 at once

Note: File size limits are specific to this converter. Batch and parallel processing limits apply to all images converters site-wide. See all converter limits →

How are credits calculated for this conversion?

Cost: 1 credit per 5 MB

How it works:

Files up to 5 MB: 1 credit
6-10 MB: 2 credits
11-15 MB: 3 credits
16-20 MB: 4 credits

Example: A 5 MB image = 1 credit. A 95 MB image = 19 credits.

Why per-megabyte? Larger files require more resources (processing, bandwidth, storage).

What are my daily and monthly credit limits?

Credit allocations vary by account tier:

Tier	Daily Limit	Monthly Limit
Guest	100 credits/day	—
Free	100 credits/day	—
Pro	—	12,000 credits/month

Daily credits (Guest & Free tiers) reset every day at midnight UTC. Monthly credits (Pro) reset on your billing cycle date.

Note: With 1 credit per 5 MB, images under 5 MB cost 1 credit each. Pro users can convert 12,000 images per month.

Answers at a Glance

Quick answers to common questions.

What's New in PNG to ICO

Latest improvements to this converter

Last updated January 16, 2026

Jan 16, 2026

Added Resize and Metadata options.

Dec 18, 2025

Initial launch of PNG to ICO converter with 6-layer Windows icon output and transparency preservation.

Need to get more done? Pro starts from $5.

1 GB files 1,000 per batch Priority queue Web + API

See Pricing →

No subscription required.