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Bigjpg alternative · 25 free credits

The best Bigjpg alternative, online

Bigjpg is a simple enlarger for anime art and photos — but the free tier stops at 20 images a month, 5 MB and 3000 × 3000 px. Kenerate has no monthly cap and no subscription: go to 8K or 128 MP, and use six more engines when a photo needs more than enlarging.

Add an imageJPG, PNG or WEBP up to 25 MB · opens the free toolUpscale an image free
No photo? Try one:
  • 25 free credits
  • No install, no GPU
  • Up to 8K or 128 MP
  • No watermark
Anime girl with silver hair and a red scarf on a rooftop at sunset — original 300 px
Anime girl with silver hair and a red scarf on a rooftop at sunset — after Real-ESRGAN
BEFORE · 300 pxAFTER · 1832 × 2290

Real-ESRGAN300 px → 1832 × 2290

Try this photo
  • Real-ESRGAN
  • Image Upscaler 2K · 4K · 8K
  • Kenerate Upscale · 128 MP
  • Ultimate Upscaler
  • Clarity Pro
  • Phota Enhance
  • Recraft Creative
Landscape to 4K — after Image Upscaler
Anime art — after Real-ESRGAN
Tiny portrait — after Image Upscaler
Blurry pet photo — after Phota Enhance
AI concept art — after Ultimate Upscaler
1930s portrait — after Phota Enhance
Text on a menu — after Image Upscaler
Product shot — after Real-ESRGAN
Landscape to 4K — after Image Upscaler
Anime art — after Real-ESRGAN
Tiny portrait — after Image Upscaler
Blurry pet photo — after Phota Enhance
AI concept art — after Ultimate Upscaler
1930s portrait — after Phota Enhance
Text on a menu — after Image Upscaler
Product shot — after Real-ESRGAN

Short answer

Updated

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.

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

Real results

What Kenerate does that Bigjpg users ask for

Every slider is a real Kenerate output from the bad input on the left. Drag to compare, then try the same photo.

  1. Anime girl with silver hair and a red scarf on a rooftop at sunset — before
    Anime girl with silver hair and a red scarf on a rooftop at sunset — after
    BeforeAfter

    01Anime & illustration

    Line art that stays crisp

    Outlines stay dark and clean, flat colours stay flat — no grey mush around every edge.

    Real-ESRGAN · 300 px → 1832 × 2290

    Try it now
  2. Turquoise alpine lake below snowy mountains with a wooden cabin — before
    Turquoise alpine lake below snowy mountains with a wooden cabin — after
    BeforeAfter

    02Upscale to 4K

    A tiny landscape, wallpaper-sized

    480 px in, 5461 × 3072 out. Trees, snow and the cabin sharpen instead of smearing.

    Image Upscaler · 480 px JPEG → 4K · 5461 × 3072

    Try it now
  3. Close-up portrait of a young woman with freckles and dark curly hair — before
    Close-up portrait of a young woman with freckles and dark curly hair — after
    BeforeAfter

    03Low resolution

    A 300-pixel portrait, now 4K

    Skin, lashes and curls come back sharp — and it's still the same person. A faithful upscale, not a new face.

    Image Upscaler · 300 px JPEG → 4K · 3664 × 4579

    Try it now
  4. Fantasy castle on a cliff above a glowing sea with dragons — before
    Fantasy castle on a cliff above a glowing sea with dragons — after
    BeforeAfter

    04AI art

    Renders to 5K and beyond

    A 512 px fantasy render to 5461 × 3072 — towers, waves and dragons all sharper.

    Ultimate Upscaler · 512 px render → 4K · 5461 × 3072

    Try it now

Gallery

More real results

Every image below is a real Kenerate output. Filter by problem, then open any one to compare before and after.

Checked 26 September 2026

Kenerate vs Bigjpg at a glance

Bigjpg details from its own website or repository; Kenerate details from the tool.

  • Kenerate AIkenerateai.com

    Free tier
    25 free credits on sign-up
    Max upload
    25 MB
    Max output
    8K or 128 MP
    Scales
    2K / 4K / 8K or 4–128 MP
    Noise reduction
    Phota Enhance (grain & blur)
    Anime / artwork mode
    Real-ESRGAN keeps line art
    Photo restoration
    Phota Enhance
    Creative detail
    Clarity Pro, Recraft
    Payment model
    No subscription — one-time credit packs

  • Bigjpg

    Free tier
    20 images a month
    Max upload
    5 MB free · 50 MB paid
    Max output
    3000 × 3000 px free · 16× paid
    Scales
    2×, 4×, 8×, 16×
    Noise reduction
    5 levels
    Anime / artwork mode
    Artwork mode
    Photo restoration
    No
    Creative detail
    No
    Payment model
    Time-limited plans (2, 6 or 12 months)

Why kenerateai.com

Why choose Kenerate over Bigjpg?

Six reasons people switch — all things you can check in the tool with your free credits.

  • No subscription

    One-time credit packs that never expire — no monthly plan to cancel.

  • 25 free credits, no watermark

    Test on your own images first. Free results download clean, same as paid.

  • Seven engines in one tool

    Faithful (Real-ESRGAN, Image Upscaler, Kenerate Upscale, Ultimate), creative (Clarity Pro, Recraft) and restore (Phota Enhance).

  • Up to 8K or 128 MP

    Pick 2K, 4K or 8K, or an exact megapixel size for print — the tool shows the output in pixels.

  • Nothing to install, no GPU

    Runs in the browser on phone or desktop. The upscaling happens on our servers, not your graphics card.

  • A whole studio around it

    Batch-upscale 20 photos in Edit Studio, remove backgrounds, edit with AI — same account, same credits.

Honest verdict

Kenerate or Bigjpg: which should you pick?

Bigjpg is a good tool. Here is when each one is the better choice.

Choose Kenerate if…

  • You need outputs bigger than 3000 × 3000 px without buying a plan
  • You upscale in bursts — one-time credits instead of a 2-, 6- or 12-month plan
  • You also work with photos that are blurry, grainy or old (Phota Enhance)
  • You want exact print sizes in megapixels, or creative detail with Clarity Pro

Choose Bigjpg if…

  • You only upscale anime art and 20 free images a month is enough
  • You want a very simple one-page enlarger with a noise-reduction slider
  • You upscale thousands of images and a Premium plan (2,000 a month for 12 months) fits your volume

At 100%

See the quality before you switch

The same crop stretched with a normal resize and upscaled by Kenerate. Then run your own hardest image with the free credits.

  • Anime girl with silver hair and a red scarf on a rooftop at sunset — the 300 px original stretched to the same size (bicubic)
    Stretched
    Anime girl with silver hair and a red scarf on a rooftop at sunset — the same crop after Real-ESRGAN
    Real-ESRGAN

    Anime art · 300 px → 1832 × 2290

  • Turquoise alpine lake below snowy mountains with a wooden cabin — the 480 px JPEG original stretched to the same size (bicubic)
    Stretched
    Turquoise alpine lake below snowy mountains with a wooden cabin — the same crop after Image Upscaler
    Image Upscaler

    Landscape to 4K · 480 px JPEG → 4K · 5461 × 3072

Left: the original enlarged with ordinary bicubic resizing. Right: the same area of the real Kenerate output. Both crops are shown at the same size.

Seven engines

Which engine should you use?

Every engine, what it is best at and how big it goes. Start with the default and switch when the image needs it.

  • FaithfulDEFAULT

    Real-ESRGAN

    Classic super-resolution — sharper edges, less noise, bigger image.

    Best for: Quick clean-ups of AI renders, web images and product shots.

    Larger, sharper copy ~25s per image

    Use

  • Faithful

    Image Upscaler

    Straight upscale to 2K, 4K or 8K that keeps the original texture.

    Best for: Everyday photos and AI art to a standard size.

    Up to 8K ~45s per image

    Use

  • Faithful

    Kenerate Upscale

    Pick the exact size in megapixels — up to 128 MP, very fast.

    Best for: E-commerce and design assets at a precise size, fast.

    Up to 128 MP ~14s per image

    Use

  • Restore

    Phota Enhance

    Restores old, blurry or damaged photos and rebuilds lost detail, up to 4K.

    Best for: Old family photos, archives and low-res pictures you want to print.

    Restored · up to 4K ~37s per image

    Use

  • Creative

    Clarity Pro

    Up to 16× with a creativity dial — stay true or invent fine detail.

    Best for: Portraits and campaign visuals for print; keeps identity, adds detail.

    Up to 64 MP ~81s per image

    Use
New accounts get 25 free credits to try the engines on their own images.

About Bigjpg

What is Bigjpg?

From Bigjpg's own website or repository, checked 26 September 2026. Plans change — confirm on their site.

Bigjpg enlarges images with deep convolutional neural networks and has two modes: Artwork (anime and illustrations) and Photo.

It offers 2×, 4×, 8× and 16× enlargement and five noise-reduction levels (None, Low, Medium, High, Highest).

Free: 20 images a month, up to 5 MB and 3000 × 3000 px, up to 4×.

Paid plans allow 50 MB uploads and 16×: Basic for 2 months (500 images/month), Standard for 6 months (1,000/month), Premium for 12 months (2,000/month).

Visit Bigjpg

Compare with Bigjpg on your own image — your first ~34 upscales are free.

Try Kenerate free

Switching

How do I switch from Bigjpg to Kenerate?

  1. Step 1: Open the Kenerate upscaler

    Go to kenerateai.com/app/tool/image-upscale — 25 free credits on sign-up.

  2. Step 2: Upload the same image you used on Bigjpg

    JPG, PNG or WEBP up to 25 MB — no 5 MB limit.

  3. Step 3: Pick the engine

    Real-ESRGAN for anime and art, Image Upscaler for 4K or 8K, Phota Enhance for grainy or old photos.

  4. Step 4: Compare and download

    Check the slider at 100% and download — no watermark.

Test before you commit

Run the same 3–5 images (a face, text, a texture, a low-res screenshot) through both tools and compare at 100% zoom.

Open KenerateHow it works

Real results

What do Kenerate upscales look like?

Hover — or tap “Original” — to see each image before.

Try it free
  • Turquoise alpine lake below snowy mountains with a wooden cabin — after Image UpscalerUpscaler

    Landscape to 4K

    480 px JPEG → 4K · 5461 × 3072

  • Anime girl with silver hair and a red scarf on a rooftop at sunset — after Real-ESRGANESRGAN

    Anime art

    300 px → 1832 × 2290

  • Faded 1950s black-and-white family photo in front of a house, with scratches and a torn corner — after Phota EnhancePhota

    1950s family print

    Scanned print → Restored · 2400 px

  • Cafe chalkboard menu listing coffee drinks and prices — after Image UpscalerUpscaler

    Text on a menu

    360 px JPEG → 4K · 4730 × 3547

In depth

Choosing an enlarger: size, speed and faithfulness

What to check before you pick Bigjpg or anything else — with sources.

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.

Start free

Start free, top up only when you need to

25 free credits on sign-up. The same credits work in every Kenerate tool.

  • 25 free credits on sign-up

    Test on your own images before you buy anything.

  • Credits never expire

    One-time packs — use them this week or next year.

  • No subscription, no watermark

    Nothing to cancel. Free results download clean.

  • One balance, every tool

    The same credits work across images, video, voice and 3D.

See credit packs

Tried it? Tell us how it went

We only publish real, verified reviews — never invented quotes. Send a line about your result (and whether we may quote you), and it will appear here.

Send a review

FAQ

Bigjpg alternative — FAQ

6 questions

Still stuck?

A real person answers — usually within a day.

Email usTry it free
01

What is a good Bigjpg alternative?

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.

02

Is Bigjpg free?

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.

03

Is there a free alternative to Bigjpg?

Kenerate gives 25 free credits on sign-up to test it, with no watermark; bigger jobs use one-time credit packs that never expire.

04

Which is better for anime, Bigjpg or Kenerate?

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.

05

Can Kenerate go past 3000 × 3000 pixels?

Yes. Image Upscaler outputs 8K and Kenerate Upscale goes up to 128 megapixels.

06

Does Kenerate have a subscription?

No. You buy one-time credit packs, and credits never expire.

Every pixel, rebuilt. Up to 128 MP.

Seven engines in one browser tool — faithful, creative and restoration — up to 8K or 128 MP.

AI engines
7
AI engines
Largest output
128 MP
Largest output
Free credits to start
25
Free credits to start
Straight upscale to
8K
Straight upscale to

Explore the toolkit

More upscale, enhance and restore tools

Every Kenerate page for making images bigger, sharper, cleaner and older photos new again.

See more of Kenerate AI in your Google resultsAdd kenerateai.com as a preferred source — Google shows more from your preferred sources in Top Stories and AI answers.

Tools

How-to guides

Alternatives

Keep exploring

Related guides

Also searched for

bigjpg alternative · bigjpg alternative free · sites like bigjpg · bigjpg online · bigjpg vs kenerate · free image upscaler · ai image upscaler · upscale image online

Written by the Kenerate AI team

We make Kenerate AI. Bigjpg is described from its own website or repository, and we link to it so you can check. Last updated 26 September 2026. Corrections: hello@kenerateai.com.

Sources

Ready when you are

Try the Bigjpg alternative free

25 free credits on sign-up. No subscription, no watermark.

Upscale an image freeSee pricing
  • 25 free credits
  • No watermark
  • Credits never expire