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Head-to-head · Photo Resizing Software

Converseen vs Photo Size Optimizer

  • Updated Sep 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score Converseen #3 in Photo Resizing Software 8.2/10 Free plan Free plan✓ 0 of 2 features Visit Converseen
Photo Size Optimizer #7 in Photo Resizing Software 7.0/10 Free plan Free plan✓ 2 of 2 features Visit site

Converseen leads on 0 checks, Photo Size Optimizer on 2, and 1 is even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreConverseen · 8.2/10
  • Free planboth
  • Most featuresPhoto Size Optimizer · 2 of 2

Converseen scores higher on our rubric for photo resizing software: 8.2 against 7.0 out of 10; our editors rank them #3 and #7.

Photo Size Optimizer offers batch resizing; Converseen doesn't publish it. Photo Size Optimizer offers quality controls; Converseen doesn't publish it.

Converseen is the better fit for open-source multi-platform batch resizing. Photo Size Optimizer is the better fit for free Mac batch optimization.

  • Converseen fits best

    Open-source multi-platform batch resizing

  • Photo Size Optimizer fits best

    Free Mac batch optimization

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Side by side

Feature Converseen 8.2/10 Visit ↗ Photo Size Optimizer 7.0/10 Visit ↗
At a glance
Editor score 8.2 7.0
Ranking #3 in Photo Resizing Software #7 in Photo Resizing Software
Best for Open-source multi-platform batch resizing Free Mac batch optimization
Pricing model Free Free
Starting price Not published Not published
Free plan ✓ ✓
Free trial — —
Deployment Desktop Desktop
Platforms Windows, macOS, Linux macOS
Support Email, Community, Docs Email
Built for Solo, Small business Solo, Small business
Features Converseen 0/2 · Photo Size Optimizer 2/2
Batch resizing Not published ✓ (best)
Quality controls Not published ✓ (best)
Specs
Output formats DPX, EXR, GIF, JPEG, JPEG-2000, PNG, SVG, TIFF, WebP, HEIC/HEIF, AVIF JPG, BMP, PNG, GIF, PDF, PSD, PNT, RGB, ARW, BMPF, CUR, CRW, CR2, DCR, DNG, EPSF, EPSI, EPI, EPS, EXR, EFX, ERF, FPX, FPIX, FAX, FFF, GIFF, G3, HDR, ICNS, ICO, JP2, JFX, JFAX, JPE, JFIF, JPF, MPO, MAC, MRW, MOS, NRW, NEF, ORF, PICT, PIC, PCT, PS, PNTG, PNGF, PEF, QTIF, QTI, RAW, RAF, RW2, RWL, SR2, SRF, SRW, SGI, TRIC, TIFF, TGA, TARGA, TIF, XBM, 3FR, 8BPS
Resize methods Not published Dimensions
Maximum batch size Not published Not published
Supported platforms Not published Desktop
Our review
Pros
  • Batch resizing, conversion, compression, rotation, and flipping
  • Supports more than 100 formats, including WebP, HEIC/HEIF, and AVIF
  • Available across Windows, Linux, macOS, and FreeBSD
  • Batch-resizes hundreds of photos or entire folders
  • Supports lossless and lossy optimization modes
  • Works with more than 70 image formats
Cons
  • Batch automation is manual rather than automated
  • The macOS distribution is labeled beta
  • RAW support depends on the package and ImageMagick build
  • Available only for macOS
  • Resizing is based on dimensions rather than broader methods
  • Version history in the App Store ends in 2016
Our verdict

Converseen is a free, open-source desktop batch image processor for people who need to resize, convert, compress, rotate, flip, or rename multiple images. Its feature set also covers PDF-to-image conversion and image extraction from…

Read the review →

Photo Size Optimizer is a free Mac desktop application for resizing and optimizing individual images or folders. It is aimed at users preparing groups of photographs for storage, sharing, or web use, especially when reducing file sizes…

Read the review →
  1. ConverseenPhoto Resizing Software 8.2Free plan
  2. Photo Size OptimizerPhoto Resizing Software 7.0Free plan

Strengths and trade-offs

  • Converseen — where it wins

    • Batch resizing, conversion, compression, rotation, and flipping
    • Supports more than 100 formats, including WebP, HEIC/HEIF, and AVIF
    • Available across Windows, Linux, macOS, and FreeBSD

    Where it doesn't

    • Batch automation is manual rather than automated
    • The macOS distribution is labeled beta
    • RAW support depends on the package and ImageMagick build

  • Photo Size Optimizer — where it wins

    • Batch-resizes hundreds of photos or entire folders
    • Supports lossless and lossy optimization modes
    • Works with more than 70 image formats

    Where it doesn't

    • Available only for macOS
    • Resizing is based on dimensions rather than broader methods
    • Version history in the App Store ends in 2016
  • Converseen8.2/10 · Free plan

    A capable free desktop tool for batch resizing, conversion, compression, and renaming.

    Visit ConverseenFull verdict →
  • Photo Size Optimizer7.0/10 · Free plan

    A free Mac batch optimizer with broad format support and dimension-based resizing.

    Visit siteFull verdict →

More comparisons

All photo resizing software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated · How we research and update