# Free Reddit Banner Size Checker and Resizer

> Check a subreddit banner, preview the wide crop, and export desktop or mobile-ready PNG dimensions without uploading the image.

- Canonical: https://fluxgravity.io/tools/reddit-banner-size-checker
- Price: Free
- Category: Reddit

## What the tool does

Turn one source image into a reviewable Reddit community banner while keeping important artwork away from fragile crop edges.

**Direct answer:** Reddit currently recommends separate shallow banner canvases for desktop and mobile community views. This checker reads the source dimensions locally, lets you choose a 1072 x 128 desktop or 1080 x 128 mobile canvas, and exports either a center crop or a fitted version. Keep essential artwork centered because real viewport crops can still vary.

- Desktop and mobile canvases
- Crop or letterbox control
- Private in-browser export

## How to use it

### 1. Choose the artwork

Upload an image you own or are allowed to edit; it remains inside the browser.

### 2. Pick a Reddit canvas

Compare the current desktop and mobile working sizes and choose crop or fit.

### 3. Export and preview

Download the PNG, upload it in Reddit mod tools, and inspect the live result on both device classes.

## Reddit banners are unusually wide and easy to crop badly

A subreddit banner has very little vertical room compared with its width. A normal landscape photograph often loses faces, labels, or a logo when it is forced into that strip. Start with artwork designed for the shape, or use the fit option when preserving the whole source matters more than filling every pixel.

Reddit currently documents separate minimum working dimensions for desktop and mobile. Those numbers describe the upload canvas, not a promise that every viewport will reveal every edge. Keep the community name and essential subject near the center, use the outer area for texture, and verify the saved banner in the current Reddit interface.

## Use crop and fit for different source images

Crop fills the selected canvas and removes overflow from the long or tall side. It works best with a wide illustration that has safe space around the focal point. Fit preserves the whole source and adds a background around it, which is safer for logos but may create visible bars.

The downloaded file is a technical starting point, not an approval of the artwork. Check image rights, contrast, readable text, moderation expectations, and how the banner works beside the subreddit avatar and display name before publishing it.

## Reddit banner working canvases and safe design decisions

Treat the documented pixel sizes as upload canvases, then protect the message against responsive cropping. The same artwork can be delivered in both versions, but each exported file should be inspected in its final slot.

| Canvas | Useful starting size | Design review |
| --- | --- | --- |
| Desktop community banner | At least 1072 x 128 px | Center the identity and check wide-browser crops |
| Mobile community banner | At least 1080 x 128 px | Preview on narrow and large phones after upload |
| Source artwork | Larger than both targets when possible | Avoid enlarging a small raster image into visible blur |
| Essential safe region | Central portion of the strip | Keep names, faces, and key marks away from both ends |
| Background extension | Texture, color, or expendable detail | Make edge loss harmless rather than surprising |

Reddit's official help page is linked below the workbench. The saved community view is the final test because interface and viewport behavior can change.

## When each export mode is useful

### Illustrated community header

Use crop when the source was designed for a wide strip and the central subject has generous horizontal safe space.

### Sponsor or event artwork

Use fit when every logo or date must remain visible, then choose a deliberate background color for the unused area.

### Photo-led subreddit

Crop around one clear subject and avoid placing faces at the far left or right where responsive display can remove them.

### Desktop and mobile pair

Export both documented canvases and inspect them independently instead of assuming one upload proves the other.

## Banner review checklist

Complete the visual and rights review before the file enters Reddit's community appearance controls.
- Confirm ownership or permission for every photograph, logo, typeface, and illustration.
- Keep the community identity readable at 128 pixels high without relying on zoom.
- Move essential content toward the center and make edge detail expendable.
- Check contrast beside the avatar, community name, and interface controls.
- Upload and inspect both desktop and mobile views while signed out when possible.
- Keep the editable source because Reddit's documented sizes or presentation can change.

## Why otherwise good banner files fail

### Normal photo forced into a strip

A 3:2 or 4:3 photograph loses most of its height when it fills an extremely wide banner canvas.

### Edge-anchored logo

A mark that looks balanced in the exported file can disappear under responsive crops or interface furniture.

### Tiny promotional copy

Long slogans, dates, and disclaimers become unreadable in a 128-pixel-high display and should live in community content instead.

### One-device approval

A banner that passes on one browser width has not been checked on mobile apps and other desktop widths.

## Frequently asked questions

### What size should a Reddit banner be?

Reddit Help currently lists at least 1072 x 128 pixels for desktop and 1080 x 128 pixels for mobile. Confirm the current mod-tools guidance before publishing.

### Does this tool upload my banner?

No. Reading, previewing, resizing, and exporting happen in your browser.

### Why does my banner still look cropped?

Reddit can display the banner through different viewport shapes. Keep essential content centered and inspect both desktop and mobile after upload.

### Should I use text in a subreddit banner?

Use only short, high-contrast text that remains readable at a small height. Do not make the banner the only place important community information appears.

### Can I export a transparent PNG?

The crop export preserves source pixels; fit mode uses the selected solid background so uncovered space is intentional.

## Continue in FluxGravity

Use FluxGravity to draft the community positioning, rules, recurring posts, welcome material, and moderation handoff from approved inputs.

https://app.fluxgravity.io/agent