Alternatives

Products that do what Thumbor – open-source on-demand image cropping, resizing, and filters does

1. 1FA
   Filmulator – a streamlined, open-source raw photo editor▲282

   2021 · filmulator.org

2. 2SI
   Simple image resizing/optimization service▲171

   2017 · scaley.io

3. 3CT
   Crops – thumbnails with custom size, position, and quality via API▲7

   2017 · github.com

4. 4PC
   Polarr.co, a WebGL photo editor▲167

   2014 · polarr.co

5. 5OI
   ObjectCropBot – Interactively Crop Objects from Photos with AI▲33

   2017 · andreykurenkov.com

6. 6IH
   Imgp – high-performance batch image resizer & rotator▲5

   2019 · github.com

7. 7MF
   Morton Filter: Fast, Self-Resizing Alternative to Bloom Filter▲11

   2019 · github.com

8. 8AA
   Amplify – A tiny script allowing inline image zoom▲50

   2017 · github.com

9. 9PA
   Poxi – A Hackable Pixel Art Editor▲144

   2017 · github.com

10. 10OA
    Optimage – Advanced image optimization tool▲39

    2018 · getoptimage.com

11. 11RE
    react-easy-crop – crop images with easy interactions▲5

    2018 · github.com

12. 12FB
    Fast bulk thumbnails image explorer and classification tool for ML▲13

    2019 · github.com

13. 13MI
    Mobile image cropping that doesn't suck▲6

    2014 · github.com

14. 14
    Lanto▲89

    An Intuitive Batch Photo Resizer

    2017

15. 15SA
    Smartcrop, a Go library that finds good image crops for arbitrary sizes▲5

    2017 · github.com

16. 16OP
    Onion Packer – An open source Textures and Images organizer▲32

    2017 · mikepicker.github.io

17. 17CB
    Cloud based image optimization. Perfectly sized images everytime▲6

    2019 · optimole.com

18. 18FC
    Fast client-side bulk images resizer▲5

    2025 · prodshot.net

19. 19AF
    A fast HEIF to JPEG converter aimed at thumbnailing▲8

    2017 · github.com

20. 20VA
    Vinci, a web based simplified Photoshop with an API▲11

    2013 · vinci.io

21. 21PI
    Pixelator.io – Secure data in pictures▲29

    2015 · pixelator.io

22. 22PA
    Photish, a simple multithreaded static photo portfolio generator▲29

    2015 · github.com

23. 23ME
    Mozjpeg encoder – smaller jpegs for everyone▲23

    2014 · mozjpeg.codelove.de

24. 24FA
    Free AI Image Upscaler (100% local, private, and free)▲6

    Jan 2026 · freeaitoolforthat.com

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