# Bigjpg alternative

> The best Bigjpg alternative depends on what you upscale. Kenerate AI is a strong pick when you hit Bigjpg's free limits (20 images a month, 5 MB, 3000 × 3000 px, up to 4×): it has no monthly cap, uses Real-ESRGAN for anime and Image Upscaler for exact 4K/8K, outputs up to 8K or 128 MP, and adds photo restoration and creative detail. New accounts get 25 free credits.

URL: https://kenerateai.com/bigjpg-alternative
Publisher: Kenerate AI (https://kenerateai.com)
Last updated: 26 September 2026

## Key facts
- Bigjpg free: 20/month · 5 MB · 3000 px · 4×
- Bigjpg paid: Up to 16× · 50 MB uploads
- Kenerate: 7 engines, no monthly cap
- Kenerate max: 8K or 128 MP

## Steps
1. Open the Kenerate upscaler — Go to kenerateai.com/app/tool/image-upscale — 25 free credits on sign-up.
2. Upload the same image you used on Bigjpg — JPG, PNG or WEBP up to 25 MB — no 5 MB limit.
3. Pick the engine — Real-ESRGAN for anime and art, Image Upscaler for 4K or 8K, Phota Enhance for grainy or old photos.
4. Compare and download — Check the slider at 100% and download — no watermark.

## In depth

### Know the size you need
Most outputs have a target: Shopify displays square product photos best at 2048 × 2048 px [1], Amazon prefers over 1,000 px for zoom [2], and a Walgreens 24×36 poster needs 5400 × 3600 px [3]. Bigjpg's free tier stops at 3000 × 3000 px, which rules out large prints without a plan.

### Test at 100%, not as a thumbnail
Researchers compare upscalers with perceptual metrics such as LPIPS because simple pixel scores miss what people notice [4]. You don't need the maths: open both results at 100% and compare line art, faces and small text.

### Sharper isn't always more accurate
Blau and Michaeli showed every upscaler trades faithfulness against natural-looking detail [5]. For anime and logos you want faithful and clean; for paintings a little invented texture can look better. Pick the engine per image.

References:
[1] Shopify Help — Product media types and sizes: https://help.shopify.com/en/manual/products/product-media/product-media-types
[2] Amazon Seller Forums — product image size guidance: https://sellercentral.amazon.com/seller-forums/discussions/t/4b3c4c39-6f8c-4312-aa0e-99982eb8f5e1
[3] Walgreens Developer — Image requirements: https://developer.walgreens.com/support/image-requirements
[4] Zhang et al. — LPIPS (CVPR 2018): https://arxiv.org/abs/1801.03924
[5] Blau & Michaeli — The Perception-Distortion Tradeoff (CVPR 2018): https://arxiv.org/abs/1711.06077

## FAQ
Q: What is a good Bigjpg alternative?
A: Kenerate AI: no monthly cap, outputs up to 8K or 128 MP, Real-ESRGAN for anime, and extra engines for restoration and creative detail. Other options include waifu2x (free, in the browser) and the Upscayl desktop app.

Q: Is Bigjpg free?
A: Bigjpg's free tier gives 20 images a month, up to 5 MB and 3000 × 3000 px, at up to 4×. Larger images and 8×/16× need a paid plan.

Q: Is there a free alternative to Bigjpg?
A: Kenerate gives 25 free credits on sign-up to test it, with no watermark; bigger jobs use one-time credit packs that never expire.

Q: Which is better for anime, Bigjpg or Kenerate?
A: Both handle anime well. Kenerate's Real-ESRGAN keeps line art and flat colours clean; Bigjpg's Artwork mode has adjustable noise reduction. Try the same image in both.

Q: Can Kenerate go past 3000 × 3000 pixels?
A: Yes. Image Upscaler outputs 8K and Kenerate Upscale goes up to 128 megapixels.

Q: Does Kenerate have a subscription?
A: No. You buy one-time credit packs, and credits never expire.

## Related pages
- AI image upscaler: https://kenerateai.com/ai-image-upscaler
- Upscale image: https://kenerateai.com/upscale-image
- AI image enhancer: https://kenerateai.com/ai-image-enhancer
- Upscale image to 4K: https://kenerateai.com/upscale-image-to-4k
- Increase image resolution: https://kenerateai.com/increase-image-resolution
- HD photo converter: https://kenerateai.com/hd-photo-converter
- Unblur image: https://kenerateai.com/unblur-image
- Sharpen image: https://kenerateai.com/sharpen-image
- Unpixelate image: https://kenerateai.com/unpixelate-image
- Photo restoration: https://kenerateai.com/photo-restoration
- Uncensored image enhancer: https://kenerateai.com/enhance-ai
- Enhance AI art: https://kenerateai.com/enhance-ai-art
- Anime upscaler: https://kenerateai.com/anime-upscaler
- Bulk image upscaler: https://kenerateai.com/bulk-image-upscaler
- Remove glare from photo: https://kenerateai.com/remove-glare-from-photo
- Restore old photos: https://kenerateai.com/how-to-restore-old-photos
- Best photo restoration software: https://kenerateai.com/best-photo-restoration-software
- Denoise photos: https://kenerateai.com/how-to-denoise-photos
- Increase image resolution: https://kenerateai.com/how-to-increase-resolution-of-an-image
- Sharpen an image in Photoshop: https://kenerateai.com/how-to-sharpen-an-image-in-photoshop
- All upscaler alternatives: https://kenerateai.com/image-upscaler-alternatives
- Remini alternative: https://kenerateai.com/remini-alternative
- Let's Enhance alternative: https://kenerateai.com/lets-enhance-alternative
- upscale.media alternative: https://kenerateai.com/upscale-media-alternative
- Upscayl online: https://kenerateai.com/upscayl-online
- VanceAI alternative: https://kenerateai.com/vanceai-alternative
- waifu2x alternative: https://kenerateai.com/waifu2x-alternative
- Magnific AI alternative: https://kenerateai.com/magnific-ai-alternative
- Topaz Labs alternative: https://kenerateai.com/alternatives/topazlabs-alternative

## Sources
- Bigjpg — home page, limits and plans: https://bigjpg.com/en