Compress Photos to an Exact File Size on iPhone

Open Fitsize, pick the photo, and type 1.00 MB as the target. The app iteratively adjusts image scale and encoding quality, measuring the actual output bytes each pass, until it finds the largest version that fits under your ceiling. You see the real before-and-after size before saving.

In Fitsize, switch to the dimensions target and enter the exact width and height you need — in pixels, centimeters, or inches, decimals included. You can lock the aspect ratio to avoid distortion or unlock it for a fixed frame. The resize is a true rescale, not a crop.

Some compressor apps report a reduced size without actually producing a smaller file, so the upload still fails. Fitsize measures the real encoded output on your device after every pass and only reports the size it actually wrote. If the readout says the photo fits, the saved file fits.

No. iOS does not allow third-party apps to change the display resolution of the device — that is a system-level setting Apple controls. Fitsize works on images: it changes the resolution and file size of your photos, which is what upload forms, portals, and email limits actually care about.

Most email services cap attachments around 25 MB, and many recipients prefer far less. In Fitsize, use the email preset or set your own ceiling, and the photo is compressed on-device to fit. For several photos, batch them in one pass and share the results directly from the app.

Fitsize processes batches without an arbitrary cap: multi-select the set in your library, choose one target, and every photo is converged to fit. That suits jobs like site documentation or listings where dozens or hundreds of photos must land under the same portal limit.

In many apps it does, silently. Fitsize preserves EXIF metadata — including capture date and GPS location — by default, so your records stay intact. When you're sending a photo to a stranger and want privacy instead, a single toggle strips all metadata from the output.

Resizing changes pixel dimensions — for example 4032×3024 down to 1200×900 — while compressing changes the file's byte size by re-encoding at lower quality. They interact: fewer pixels usually means fewer bytes. Fitsize handles both, and its byte-target mode combines them automatically to hit your ceiling.

Applications usually specify exact pixel dimensions or a physical size like 2×2 inches. Fitsize includes dimension presets for common ID formats and lets you enter any exact size. Note these are size templates only — Fitsize does not verify official compliance, and requirements vary by country, so check your issuer's rules.

Not in Fitsize. Resizing rescales the entire image to the new dimensions; nothing is cut off unless you deliberately unlock the aspect ratio and choose a differently proportioned frame. This differs from apps that quietly crop to reach a size, which is a common complaint in this category.

Some web-based tools do, which is slow and a privacy risk. Fitsize does all resizing and compression on the iPhone itself using Apple's imaging frameworks. Nothing is uploaded, no account is needed, and the app works offline.

Yes. Fitsize ships a 'Fit under…' Shortcuts action, so you can wire compression into your own shortcuts or invoke it right when an upload fails. Pick the photo, state the ceiling, and get back a file that fits.

Compression trades bytes for detail, but the loss is usually invisible at screen size until quality drops very low. Because Fitsize searches for the largest image that still fits your ceiling, it keeps as much quality as the limit allows instead of over-compressing to a tiny blurry file.