Sizera
Name a file size. Sizera gets there — and tells you what it cost.
For iPhone, iOS 17 or later. No account. Your photos never leave your phone.
Listed on the App Store as Sizera: Photo Converter.
Every upload form has a limit. Under 500 KB. Maximum 2 MB. 1080 pixels wide. Getting a photo under one is normally a guessing game: export, check the size, drop the quality, export again.
Sizera does the search instead of you. You type the number the form asked for, it finds the highest quality that fits, and it shows you the result before anything is written — the real dimensions, the real byte count, the real quality it settled on.
The part most of these apps skip
A kilobyte here is 1 000 bytes, not 1 024. That is the number the upload form counts, and the number your operating system shows you. An app that quietly uses 1 024 will tell you a file is “499 KB” when the form measures 511 000 bytes and rejects it. So we use the same arithmetic the form does.
If it has to shrink your photo, it says so — every time. When quality alone cannot reach your target, the only way down is fewer pixels. Sizera will do that, but never silently: the confirmation screen names the new dimensions before you commit, and the result screen names them again afterwards.
It never touches your original. A conversion always creates a new file.
What it does
A target you name
Ask for “under 500 KB” and it searches quality settings to land just under it, at the best quality that fits.
Destinations, not jargon
Instagram, website, email, document. Pick where the photo is going and the format, size and dimensions follow.
Location stripped by default
Every preset removes GPS coordinates. Camera settings survive — it is a surgical removal, not a wipe.
Batches
Up to 10 photos at a time for free, unlimited with Pro. One bad file fails on its own without taking the rest down.
From the share sheet
Convert straight out of Photos, Mail or Safari without opening the app first.
Turn a stack of photos into one document, written page by page so a long batch does not exhaust memory.
What it looks like
Free and Pro
The core of the app is free, and it is not a teaser: single photos, batches of ten, every built-in preset, target file size, format and dimension control, cropping, and metadata removal including location.
| Free | Pro | |
|---|---|---|
| Single-photo conversion | Yes | Yes |
| Target file size | Yes | Yes |
| Built-in presets | Yes | Yes |
| Format, dimensions, cropping | Yes | Yes |
| Remove location and metadata | Yes | Yes |
| Batch size | Up to 10 | Unlimited |
| Your own saved presets | — | Yes |
| PDF export | — | Yes |
| Batch rename | — | Yes |
| Conversion history | — | Yes |
| Full preset set in the share sheet | — | Yes |
| Promotional banner | On two screens | None |
Pro is $1.99 a year or $4.99 once, forever. Prices are shown in your local currency in the App Store.
Your photos never leave your phone
This is not a policy promise, it is a property of the build. Sizera has no server to send anything to. It contains no analytics SDK, no crash-reporting SDK, no advertising network and no tracking identifier. There is no account and no login.
The banner you see on two screens is our own advertisement for the paid version — a static piece of the app. It makes no network request and reads nothing about you.
Full detail in the privacy policy.
What it deliberately does not do
- It will not write WebP. iOS can read WebP but cannot encode it, so WebP is an input format here and nothing more. Saying otherwise would be a promise the platform cannot keep. Output is JPG, PNG, HEIC or TIFF.
- It is made for iPhone. There is no iPad layout in this version. It will run on an iPad, but it will look like an iPhone app, so we do not advertise it as universal.
- An animated GIF loses its animation. Only the first frame is converted, and the app warns you before it happens rather than after.
- There is no sync between devices. Your presets and history live on the device where you made them. iCloud Backup includes them, the way it does for any app; converted files are excluded from backup on purpose, because they are disposable.
- It does not upscale. Asking for dimensions larger than the original gets you the original's size, not invented pixels.
Questions
- Does it change my original photos?
- No. Every conversion writes a new file. The original in your library is untouched.
- What happens to the location data in my photos?
- Every built-in preset removes it. The app reads the GPS block only in order to delete it — it never uses your device's location services, and coordinates never go anywhere.
- Why does it want access to my photo library?
- To let you browse and pick photos, and separately to save results back. Limited access — only the photos you select — works fine, and you can change or revoke either permission in iOS Settings at any time.
- Does it work without an internet connection?
- Conversion is entirely local, so yes. The App Store purchase itself needs a connection, as every purchase does.
- I bought Pro and reinstalled the app.
- Settings → Restore Purchases. Pro Lifetime is tied to your Apple ID and comes back on any device signed in to it.
- How do I cancel Pro Annual?
- iOS Settings → your name → Subscriptions. Apple processes the subscription, so cancellation happens there rather than in the app.
Requirements
| Device | iPhone. It runs on an iPad, but this version is laid out for iPhone. |
| System | iOS 17 or later |
| Space | About 3 MB, plus whatever your converted files take until they are cleaned up |
| Network | Not needed to convert. Needed once, by the App Store, if you buy Pro. |
| Permissions | Photo library access to pick photos, and separately to save results. Limited access works. |