# AI image upscaler alternatives compared (2026) > The main AI image upscalers in 2026 are Let's Enhance, Topaz Gigapixel, Magnific, Upscayl, waifu2x, Bigjpg, VanceAI, upscale.media, imgupscaler.com, imageupscaler.com, Remini, Pixelcut, Picsart and Canva. Kenerate AI is the no-subscription option: seven engines in one tool, Real-ESRGAN in one pass, 2K/4K/8K set sizes, up to 128 MP, photo restoration included, 25 free credits and no subscription. URL: https://kenerateai.com/image-upscaler-alternatives Publisher: Kenerate AI (https://kenerateai.com) Last updated: 26 September 2026 ## Key facts - Tools compared: 14 upscalers + Kenerate - Kenerate engines: 7 in one tool, no subscription - Kenerate max: 8K or 128 MP - Checked: 26 September 2026 ## Steps 1. Decide what you upscale — Photos, faces, anime, old prints or AI art — and how many a month. 2. Decide how you want to pay — Occasional use: no-subscription tools or free tiers. Daily volume: a subscription or a desktop app. 3. Test the same 3–5 images — A face, text, a texture and a tiny screenshot — compare at 100% zoom. 4. Check the limits — Free-tier caps (size, count, watermarks) and the biggest output you'll need. ## In depth ### PSNR, SSIM and LPIPS Research papers score upscalers with PSNR (pixel error), SSIM (structural similarity, Wang et al. 2004) [1] and LPIPS (a learned perceptual distance, Zhang et al. 2018) [2]. LPIPS tracks human judgement better than PSNR or SSIM, which its authors call “simple, shallow functions” [2]. Vendor marketing rarely publishes any of these — so test yourself. ### Every upscaler picks a side Blau and Michaeli proved that no method can be both maximally faithful and maximally natural-looking [3]. GAN upscalers such as ESRGAN [4] and diffusion upscalers such as SUPIR [5] lean towards natural-looking detail; conservative models lean towards fidelity. Tools with both kinds — or a creativity dial — let you choose per image. ### A fair five-image test Run the same set through every tool you shortlist and compare at 100% zoom: - a face (does the person still look like themselves?) - small text (are the letters the same?) - a fine texture — hair, fur, fabric - a heavily compressed screenshot - a line-art or anime image ### Watch for hallucinations The PULSE face “depixelizer” (2020) turned a pixelated photo of Barack Obama into a white man because it looked for any face that matched the pixels [6][7]. It is an extreme case, but the same risk applies to any generative upscaler on faces and text. References: [1] Wang, Bovik et al. — SSIM (IEEE TIP 2004): https://doi.org/10.1109/TIP.2003.819861 [2] Zhang et al. — LPIPS (CVPR 2018): https://arxiv.org/abs/1801.03924 [3] Blau & Michaeli — The Perception-Distortion Tradeoff (CVPR 2018): https://arxiv.org/abs/1711.06077 [4] Wang et al. — ESRGAN (ECCV Workshops 2018): https://arxiv.org/abs/1809.00219 [5] Yu et al. — SUPIR (CVPR 2024): https://arxiv.org/abs/2401.13627 [6] Menon et al. — PULSE (CVPR 2020): https://arxiv.org/abs/2003.03808 [7] The Verge — The Obama depixelizer and AI bias: https://www.theverge.com/21298762/face-depixelizer-ai-machine-learning-tool-pulse-stylegan-obama-bias ## FAQ Q: What is the best AI image upscaler in 2026? A: It depends on how you work. For occasional use without a subscription, Kenerate's seven engines (Real-ESRGAN, 2K/4K/8K set sizes, up to 128 MP) are simple. Topaz Gigapixel suits photographers who want a desktop app; Let's Enhance and Magnific suit heavy web users; Upscayl and waifu2x are free if you're happy with their limits. Q: Which AI image upscaler is free? A: Upscayl's desktop app and waifu2x are free and open source. Free tiers with limits: Kenerate (25 free credits on sign-up, no watermark), imgupscaler.com (50 credits a month), Bigjpg (20 images a month), Pixelcut (3 downloads a day) and Remini (with ads). Q: Which upscaler goes the biggest? A: Among the tools we checked: Let's Enhance lists up to 256 MP on Starter, Topaz Gigapixel up to 32,000 px on the long side, Pixelcut up to 16K, Kenerate up to 128 MP, and Canva up to 50 MP. Q: Which upscaler is best for old photos? A: Pick one with a restoration mode: Kenerate's Phota Enhance, Let's Enhance's Old Photo mode or VanceAI's Old Photo Restoration. Q: Which upscaler is best for anime? A: Real-ESRGAN-based tools (Kenerate, Upscayl) and waifu2x are the usual picks for clean line art. Q: Do these upscalers need a GPU? A: Web tools (Kenerate, Let's Enhance, Magnific, Bigjpg…) run on their servers. Upscayl needs a Vulkan-compatible GPU; Topaz Gigapixel runs on your computer. Q: How were these tools compared? A: From each vendor's own pricing, help and product pages, checked on 26 September 2026. Plans change — confirm on the vendor's site. ## 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 - 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 - Bigjpg alternative: https://kenerateai.com/bigjpg-alternative - 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 - Let's Enhance — Pricing: https://letsenhance.io/pricing - Topaz Labs — Pricing: https://www.topazlabs.com/pricing - Topaz Gigapixel — Resize mode docs: https://docs.topazlabs.com/gigapixel-ai/filters-panel/resize-mode - Magnific — Pricing: https://www.magnific.com/pricing - Upscayl — Pricing: https://upscayl.org/pricing - Bigjpg: https://bigjpg.com/en - VanceAI — Pricing: https://vanceai.com/pricing/ - upscale.media — Pricing: https://www.upscale.media/pricing - imgupscaler.com — Pricing: https://imgupscaler.com/pricing - imageupscaler.com — Pricing: https://imageupscaler.com/pricing-plans/ - Remini — Image enlarger: https://remini.ai/image-enlarger - Pixelcut — Pricing: https://www.pixelcut.ai/pricing - Picsart — Image upscale: https://picsart.com/image-upscale/ - Canva Help — Upscale image: https://www.canva.com/help/upscale-image/