Batch Workspace
Add multiple images or folders, review outputs visually, resolve warnings, choose naming behavior, and export safe copies without modifying originals.
Version 2.4 for Mac
Calculate ratios. Resize images. Export exact assets.
Drag, paste, choose, or use Open With in Finder. Work one image at a time, open several images in separate ARC windows, or stage images and folders in Batch Workspace before exporting safe source-named copies.
Images stay on your Mac. Nothing is uploaded to us.
- Original Size -> New Size -> Preview -> Copy / Export
- Works with macOS 15+
- Free to download
- Batch Workspace and saved export recipes
- Monthly export allowance for free users
- Annual, Monthly, or Mac Lifetime Pro
Version 2.4
Batch images and folders
Presets 347 exact sizes
Themes 76 catalog themes
Original Size -> New Size -> Preview -> Copy / Export
Drag in image -> choose size -> preview fit or crop -> export exact image.
Start with the real dimensions, choose the final size or ratio, inspect the preview, then copy values or export the finished image.
- 01
Original Size
Drop in an image, paste from the clipboard, or type dimensions to read the real starting size.
- 02
New Size
Enter the width or height you need, and let the app fill in the proportional side.
- 03
Preview
Check image, frame, crop, fit, ratio, scale, and final output before anything is saved.
- 04
Copy / Export
Copy the size, CSS, HTML, Tailwind, or Markdown, or export PNG, JPG/JPEG, TIFF, or HEIC.
New in 2.4
Batch exports, saved recipes, and a clearer Pro model.
New in 2.4: Batch Workspace, multiple recipes in one batch, saved Export Recipes, Finder Open With, multi-window workflows, and ARC Pro Access.
Different recipes, one batch
Apply a social recipe to one selection and a web, email, documentation, or App Store recipe to another while keeping per-image overrides visible.
Finder Open With
Open supported images from Finder, open several images in separate ARC windows, or drop many images and choose Batch Workspace.
Better frame placement
Fit Inside, Fill & Crop, and Keep Scale remain visible while exact-output previews show what will happen before export.
ARC Pro Access
Annual Pro, Monthly Pro, and Mac Lifetime now unlock the same Pro feature set, including batch export and bundled packs.
Presets, themes, and localization
The 347 exact-size presets, workspace themes, and 21 localized runtime locales are aligned with the 2.4 release.
Interactive 2.4 product tour
See the current app from one-image math to batch export.
Each state spotlights what changes in the real Mac app: size math, batch staging, frame fit, saved recipes, presets, themes, and Quick Ratio.
Resize Image
Start with the real image size, then solve the final size.
The app reads the dropped image, keeps the original ratio visible, and fills in the missing side when you enter the target width or height.
Original 1672 x 941
New 1920 x 1080
16:9 unchanged
What changes
One input solves the matching dimension.
The final width becomes 1920, the app calculates 1080, and the preview still shows a 16:9 image instead of a stretched export.
1672 x 941 -> 1920 x 1080
Output preview
aspect-ratio: 16 / 9;
01
Calculate ratios. Resize images. Export exact assets.
Drop in an image or enter dimensions. Version 2.4 keeps the original size, new size, ratio, preview, recipes, copy output, and source-based export naming in one workflow.
Original size
New size
Ratio
Copy Output
source-name-WxH
02
New in 2.4: Batch Workspace.
Drop multiple images or folders, review every output before export, and create safe copies while originals remain untouched.
Batch Workspace
Folders
Selection review
Safe copies
Export Batch
03
Different recipes. One batch job.
Apply a social recipe to one selection and a web, email, documentation, or App Store recipe to another while per-image overrides stay visible.
Selection recipes
Per-image overrides
Warnings
Naming
Batch export
04
Open images the Mac way.
Use Finder's Open With for supported images, open multiple images in separate ARC windows, or route many files into Batch Workspace.
Finder
Open With
Separate windows
Batch Workspace
05
347 exact-size presets in 29 categories.
Search by platform, size, ratio, or use case across social, web, App Store, ecommerce, print, icons, real estate, and more.
347 presets
29 categories
My Presets
Search
Image sizing should not require guesswork.
The pain is not editing. It is getting the final image exactly right.
One wrong number can stretch an image, break a layout, or crop the wrong part. ARC: Aspect Ratio & Resize keeps the sizing workflow visible, previews the fit, and exports the exact size your project requires.
No stretched images
Lock the original proportions or choose a common ratio before you resize.
No export-dialog hunting
Choose the final size in the same place you inspect the original image.
No retyping values
Click visible chips or copy CSS, HTML, Tailwind, Markdown, or your own saved format.
Resize Image vs Resize to Frame
Resize the image, or fit it into an exact frame.
Two different jobs, two different results. The app keeps the choice visible before you save.
Resize Image
Change the actual image dimensions.
Use this when the final file needs to be exactly the entered width and height, you want the image itself resized, and proportional scaling is what you need.
Fit Inside
Keep the whole image visible.
Use this when the frame size is fixed but the full image still needs to remain visible, with padding added only when the ratio requires it.
Fill & Crop
Fill the exact frame without stretching.
Use Fill & Crop when the outside frame must be filled and the image can crop while preserving its original proportions.
Feature map
The tools are grouped around the exact-size export job.
Inspect
Real image inspection
Drop, paste, choose, or use Finder Open With to read true pixels before changing anything.
Solve
Proportional solving
Enter one side and ARC calculates the matching width or height immediately.
Presets
Searchable presets
Core ratios plus 347 exact-size presets across 29 categories.
Batch
Batch Workspace
Stage many images or folders, review the job visually, and export generated copies.
Recipes
Mixed recipe batches
Apply different Export Recipes to different selections inside one batch job.
Resize
Resize Image
Resize the actual image to the new width and height, with distortion warnings when needed.
Frame
Resize to Frame
Fit, fill and crop, keep scale, or place an image inside an exact output frame.
Copy
Developer Copy
Click value chips or copy CSS, HTML, Tailwind, Markdown, and size notes.
Export
Saved export recipes
Reuse size, frame, format, metadata, quality, and filename settings for recurring jobs.
Quick
Mac utility mode
Use Quick Ratio in the window or menu bar, including an open-at-login option, with local processing.
Preset proof
Search the exact-size presets built into the app.
The site uses the same app catalog: seven core ratios plus 347 Workspace Ratio Pack presets across 29 categories for social, web, app-store, ecommerce, real-estate, print, wallpaper, and everyday export work.
Workspace Ratio Pack
347 searchable exact-size presets, not a marketing checklist.
Search a platform, a job, a dimension, or a ratio. Then bring the matching preset into the app, preview the fit or crop, and export the final image without stretching.
354 total entries
29 pack categories
7 core ratios
1200 x 630
Try App Store, Open Graph, real estate, 1200x630, or 16:9.
Loading ratio presets from the app catalog.
Developer Copy
Copy the size in the format you actually need.
Copy the size in the format you actually need - no extra calculator tabs, no retyping, no almost-right values.
aspect-ratio: 16 / 9;Choose a format, then copy the exact value.
Made for the moments when the exact size matters.
For the everyday image jobs that still need to be right.
Websites and landing pages
Prepare hero images, Open Graph graphics, cards, thumbnails, and responsive images.
App and product screenshots
Resize screenshots for product pages, documentation, support articles, and app listings.
Social posts and ads
Place images into fixed frames while preserving the part of the photo that matters.
Real estate and business listings
Resize listing photos, client graphics, blog images, and presentation images without stretching them.
Developer documentation
Copy image sizes, HTML attributes, Markdown snippets, and CSS helpers without retyping them.
Print-aware prep
Check unit-aware details when the image needs to make sense beyond pixels.
A focused tool, not another editor
Use ARC when one image or a whole batch needs exact output.
Preview and big editors have their place, but exact sizing often means dialogs, actions, or repeated export setup. ARC keeps single-image math, Batch Workspace, per-selection Export Recipes, fit or crop previews, and developer copy in one purpose-built workflow.
JobPreviewPhotoshop / PixelmatorARC
One image to the exact sizeResize dialogPowerful, more setupDirect workflow
Batch export many imagesNo visual batch workspaceActions or export scriptsVisual Batch Workspace
Different recipes in one batchNoSeparate runs or manual setupPer-selection Export Recipes
Preview fit or crop before exportLimitedPowerful, manualExact-frame preview
Copy CSS, HTML, Tailwind, MarkdownNoManualOne click
Workspace Theme Gallery
Preview the workspace theme system without opening the app.
Select any theme to repaint a live app representation. The colors, chrome, canvas, guide lines, chips, and preview workspace fade into the selected scheme.
Core & Signature
Blueprint Dark
Subtle blueprint grid with electric guide lines.
76 catalog themes loaded from the app tokens, plus the native Mac appearances in the app.
Free and ARC Pro Access
Unlock the complete ARC workflow.
Free users get the core calculator, image inspection, built-in copy outputs, and a monthly export allowance. ARC Pro Access unlocks unlimited exports, Batch Workspace export, saved Export Recipes, custom ratios and templates, advanced units, iCloud settings sync, workspace themes, and curated exact-size presets.
Free
Core ratio work, no purchase required.
$0
- Calculator and image inspection
- Built-in copy formats
- Copy Output and Copy Output Size
- Limited monthly image exports
Best Value
Annual Pro
Best value for creators who resize, batch export, and reuse presets often.
$29.99per year, about $2.50/mo
- All ARC Pro Access features
- Unlimited exports, Batch Workspace export, and saved Export Recipes
- Bundled workspace themes and exact-size presets
- Includes eligible App Store introductory offers
Monthly Pro
Same Pro workflow, billed month to month.
$4.99per month
- Same ARC Pro Access as Annual while active
- Unlimited exports, Batch Workspace export, and saved Export Recipes
- Bundled workspace themes and exact-size presets
- Managed or canceled through your App Store account
Limited time launch promo
Mac Lifetime
Same Mac Pro feature set, one purchase.
$119.99
$99.99one-time launch price
One-time ARC Pro Access for the Mac app. No subscription.
- Same ARC Pro Access features for Mac
- Unlimited exports, Batch Workspace export, and saved Export Recipes
- Custom ratios, templates, advanced units, themes, and exact-size presets
- Mac app only; Family Sharing not included
Support Development
Love the app? Help fuel what comes next.
Coffee, Latte, and Double Shot are optional repeatable thank-you purchases for eligible legacy users. They support ongoing development, testing, and maintenance - they do not unlock Pro, extend a subscription, or gate any features.
Coffee$2.99
Latte$9.99
Double Shot$19.99
Already bought? Existing paid-app customers get Pro automatically when the App Store can verify the old paid purchase, and legacy Family Sharing remains handled by the Mac App Store. Retired Pro, Family, pack, and Ultimate products remain recognized for compatible receipts.
Mac App Store purchases are handled by Apple. Review the Terms of Service and EULA and Privacy Policy.
Native Mac utility
A focused Mac utility, not a bloated editor.
ARC: Aspect Ratio & Resize is built to feel like a Mac app: drag and drop, a focused window, optional menu bar mode, and controls that make sense without a tutorial.
For quick jobs, Quick Ratio lives in the menu bar so you can check dimensions, lock a ratio, copy CSS, HTML, Tailwind, or Markdown, and get back to what you were doing.
- Works with macOS 15 and later
- Uses Liquid Glass styling on macOS 26 when available
- Falls back to native controls on macOS 15 through macOS 25
- Works as a regular window or menu bar utility
FAQ
A few things worth knowing before you download.
Here's what the app does, what Pro adds, and what it intentionally does not try to be.
Why not just use Photoshop, Pixelmator Pro, or Preview?
Use those apps when the job is editing. ARC: Aspect Ratio & Resize is for the narrower, frequent job of making an image the exact size you need: inspect the original, choose a final size or ratio, preview fit or crop, copy useful values, and export without distortion.
Is ARC: Aspect Ratio & Resize a full image editor?
No. It is a focused tool for sizing images, preserving proportions, previewing the result, copying useful values, and exporting the final image. It is meant to sit alongside apps like Photoshop, Figma, Canva, Pixelmator, and Preview - not replace them.
Can I use it for free?
Yes. The free version includes the core ratio calculator, image inspection, basic pixel details, built-in copy formats, Copy Output, and Copy Output Size.
What does Pro unlock?
ARC Pro Access unlocks unlimited exports, Batch Workspace export, saved Export Recipes, custom ratios and templates, advanced unit conversions, configurable metadata chips, iCloud settings sync, bundled workspace themes, curated exact-size presets, and more control over resize, frame, and export tools.
Does it support Family Sharing?
Annual Pro and Monthly Pro support App Store Family Sharing where Apple's systems allow it. Mac Lifetime is Mac-only and does not include Family Sharing. Legacy paid-app and compatibility receipts keep the sharing behavior Apple can verify for that purchase.
I bought the old paid app. Do I need to buy Pro again?
No. If you bought the old paid version, Pro unlocks automatically when the App Store can verify your purchase.
Which export formats are supported?
PNG, JPG/JPEG, TIFF, and HEIC. HEIF is available when the macOS encoder supports it.
Can I share the resized output directly?
Yes. The bottom-bar Share action renders the current output and opens the native macOS share sheet, so you can send the result through the sharing options available on your Mac.
Does it work on many images at once or generate edits for you?
Yes for batch resizing and export: Batch Workspace can stage multiple images or folders and export generated copies. No for generative editing: ARC does not create AI edits, retouch photos, or replace a full image editor.
Where do I get support?
Use the contact form on this site and include the image size, export format, purchase question, or sizing problem you need help with. Please do not send sensitive files through the form. You can also review the Privacy Policy and Terms of Service before sending personal details.
Ready to stop guessing image sizes?
Drag in one image or stage a batch, choose the size, preview the fit, copy the values, and export the exact images your project needs.
- Images stay on your Mac
- Free to download
- Optional Annual, Monthly, or Mac Lifetime Pro
- Native Mac app
Support and feedback
Tell us what you're trying to size.
Include the original dimensions, the size you needed, and what happened. Please do not send sensitive files.
Review the Privacy Policy before sending personal details.