Dev tools · alternatives · 2026

24 alternatives to Thumbor – open-source on-demand image cropping, resizing, and filters

Thumbor is a smart imaging service. It enables on-demand crop, resizing and flipping of images. It features a very smart detection of important points in the image for better cropping and resizing, using state-of-the-art face and feature detection algorithms (more on that in Detection Algorithms).

Thumbor is an open-source imaging service that performs on-demand image cropping, resizing, and flipping. It automatically detects important features like faces in images using advanced detection algorithms to ensure… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Thumbor – open-source on-demand image cropping, resizing, and filters launched in 2014; newer entries below may have overtaken it.

1
Smart Upscaler▲485
Use ML to improve and enlarge images for free
2020 · icons8.com · its alternatives →
2
ClipDrop Image Upscaler▲345
Upscale & enhance your images up to 4x with AI
2022 · clipdrop.co · its alternatives →
3UC
Using computer vision to detect birds in parks▲195
2014 · code.flickr.net · its alternatives →
4
Thumber▲7
A cloud images processing platform
2016 · thumber.io · its alternatives →
5
Thumbmagic▲311
AI thumbnail generator trained on top-performing thumbnails
Jun 2026 · thumbmagic.co · its alternatives →
6
crop.video▲227
Crop it like it's hot! Vertical and square videos in a snap.
2017 · its alternatives →
7
Image Converter▲82
Convert, crop or resize an image directly from its URL
2022 · image.pagenflow.com · its alternatives →
8
Free Image Resizer▲142
Resize Image in one click for all social media platforms
2024 · its alternatives →
9
Resizer▲151
Double the size of your image while reducing noise
2021 · resizer.in · its alternatives →
10
Crop Image▲76
Fast, easy & free image cropping online!
2020 · cropimage.com · its alternatives →
11
Thumbor Release 7.0.0▲5
thumbor is an open-source photo thumbnail service by globo.com - Release Release 7.0.0 · thumbor/thumbor
2022 · github.com · its alternatives →
12
Image Resizer 2.0▲120
Resize your images in 3 easy steps for free, by Promo.com
2021 · promo.com · its alternatives →
13
Bulk Image Crop▲8
Smart and context aware image cropping & resizing
2021 · bulkimagecrop.com · its alternatives →
14
ResizePixel▲93
Easy to use online image editor
2018 · resizepixel.com · its alternatives →
15
ThumbGen▲18
Craft high-converting thumbnails in seconds with AI.
2025 · its alternatives →
16
Smart Image Cropping Tool▲7
Batch crop with smart subject recognition — quick & precise
2025 · pic-tool.com · its alternatives →
17
Bulk Image Resizer▲76
Resize images in bulk for free
2023 · its alternatives →
18FO
Firesize – On-the-fly image resizing, no code required▲58
2015 · firesize.com · its alternatives →
19
Snap Crop▲7
Instant Crop with AI Precision
2025 · snapcrop.space · its alternatives →
20
Smart Resize▲5
Fastest & smartest bulk online image resizer
2017 · peakpx.com · its alternatives →
21
Image Resizer▲12
Resize your images quickly, perfect every time.
2023 · goonlinetools.com · its alternatives →
22
Free Online Image Cropper▲8
Crop your images easily & precisely
2025 · its alternatives →
23
Image Resizer and Rotator▲5
Image rotator &Free online tool to resize and rotate images
Nov 2025 · aiconvertertoolsfree.blogspot.com · its alternatives →
24
AutoCropper▲3
Crop multiple images at once, fast and easily
2023 · autocropper.io · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →