MLS Photo Requirements: Size, File Limits and the Rules by MLS

Agents will hand you a listing and assume the photos you deliver will "just work" in the MLS. Usually they do — but a handful of rules govern what the MLS will actually accept, and the ones photographers trip over are easy to get right once you know them. This is the practical version: what the images themselves have to be, not the tour link (that is a separate rule about branded vs. unbranded links).

One caveat up front: there is no single national MLS, and there are more than 500 of them in the United States. Where we give a number below, it comes from that MLS's own help center or rules document, linked in the table. Your market's "media policy" or "rules and regulations" is the authority: when this guide and your MLS disagree, your MLS wins.

What size do MLS photos need to be?

There is no national size standard (RESO, which sets MLS data standards, only defines a photo-count field). Each MLS publishes its own limits, usually set by the listing-entry system it runs on. Here is what eight MLSs publish:

Checked on each MLS's own site in October 2026; a dash means the page doesn't say. Most pages were updated in 2025 or 2026. The Stellar handout is undated, and the ARMLS figures come from a 2021 post. *ARMLS writes its limit as "15 MB or 2000 x 3000"; CRMLS, on the same Flexmls system, writes 3000×2000. We couldn't find a published size spec from Bright MLS, HAR, MRED or NWMLS, so they aren't listed. The widely repeated 1024×768 figure for Bright traces back to photography vendors' blogs, not to Bright.

Three things stand out:

• The minimum has moved up. 1024×768 is still MLS Now's minimum and Stellar's recommended size, but Unlock MLS sets its minimum at 2048×1536, and Canopy recommends the same because its Matrix system saves every listing photo at 2048×1536.
• The file-size cap is lower than most photographers assume. Canopy MLS (on Matrix) and MLS Now cap a photo at 6 MB, while CRMLS and ARMLS (on Flexmls) allow 15 MB. A full-size export straight from a 24-megapixel camera can be bigger than 6 MB; one sized for the web is well under it.
• JPEG is the only safe format. Canopy MLS and MLS Now accept only .jpg and .jpeg. CRMLS's Flexmls takes PNG, TIFF and more, and SmartMLS converts other formats to JPEG, but JPEG is accepted by every MLS in the table that lists formats. Phone photos in HEIC need converting first.

One export setting for every MLS in the table

Set up one MLS export preset and use it for every listing:

• Size: at least 2048×1536 and no more than 3000 wide or 2000 tall. For a 4:3 frame that's 2048×1536. Most real estate cameras shoot 3:2, so use 2304×1536 (or up to 3000×2000); 2048 wide at 3:2 is only 1365 tall, which is under Unlock's 1536 minimum.
• Format: JPEG, high quality.
• Resolution setting: 72 ppi. Unlock MLS lists a 90 DPI maximum, and print-oriented export presets often default to 240 or 300.
• File size: under 6 MB. If an export goes over, lower the JPEG quality a notch rather than the pixel size.
• Orientation: landscape. Portrait images get letterboxed or cropped awkwardly on most portals.

That one preset meets every spec in the table (reading ARMLS's "2000 x 3000" the way CRMLS writes the same Flexmls limit). Keep a separate, larger export for print or the agent's own marketing if they want it. For naming and handing off the set, see how to deliver real estate photos.

Can you put a watermark or logo on MLS photos?

No — and this is the rule photographers break most often. Nearly every MLS prohibits any branding on listing images: agent and brokerage names, headshots, logos, phone numbers, email addresses, and website URLs. It also bars promotional text overlays like "Just Listed," "Price Reduced," and "Open House." A photographer credit line counts as branding too; most systems will not allow even a small "Photo by" watermark on the images in the listing.

The one watermark you must never touch is the MLS's own copyright legend. Some systems stamp uploaded images, and removing or cropping that stamp is a violation on its own. If you want a watermark for your own protection or promotion, put it on the branded marketing set you hand the agent — not on the files destined for the MLS. Keeping the two sets separate from the start saves you from re-exporting later.

What does the first photo have to be?

The primary photo leads the listing and becomes the thumbnail everywhere it's syndicated, and many MLSs control what it can be. MLS Now requires it to be the front exterior. Stellar MLS requires a front exterior first, unless the first slot is a water view or an aerial, in which case the front exterior goes second. Unlock MLS requires a front photo without saying which slot.

It isn't universal, though. CRMLS's 2026 photo FAQ says the primary photo does not have to be exterior, as long as at least one photo shows a substantial part of the exterior. So the rule for you as the photographer is simple: always capture a strong front exterior (a front elevation, a twilight exterior, or a drone shot showing the roofline and lot) so the agent has a compliant lead photo whatever their MLS requires.

How many photos can you upload?

Caps vary more than any other rule here. In the table above they run 40 (SmartMLS, Unlock), 48 (Canopy), 50 (MLS Now, Stellar), 75 (CRMLS) and 100 (Doorify), and ARMLS has no cap at all. Some MLSs also set a minimum; Doorify requires at least 3 on residential listings.

Since you rarely know a given MLS's cap when you shoot, the safe habit is to deliver a full, well-edited set and let the agent select down if their system limits them. A set of 25 to 40 fits under every cap in the table. For how to size that set, see our guide to how many photos a listing needs.

Which edits are allowed, and what has to be disclosed?

The governing principle across MLSs is that editing may correct an image but not fabricate the property. Corrective work is expected and needs no disclosure:

• HDR blending and exposure correction for bright windows and dim corners
• White balance and color correction
• Lens correction and vertical straightening
• Basic cleanup of temporary items and minor sensor spots

What increasingly requires disclosure is any change that alters what a buyer would actually see: sky replacement, removing permanent features (a power line, a neighboring structure), and virtual staging. Many MLSs now require a label on virtually staged images, and California's AB 723 has required disclosure of materially altered listing photos — object removal and sky replacement included — since January 1, 2026. The trend across markets is toward more disclosure, not less. When an edit crosses from correcting a photo to changing the property, flag it to the agent so they can disclose it. For where the line sits in a normal workflow, see how to edit real estate photos.

How do you stay compliant on every shoot?

You do not need to memorize 500 rulebooks. A short, repeatable habit covers the common requirements:

• Deliver clean, unbranded JPEGs to the agent — keep any watermark on a separate marketing set.
• Export landscape JPEGs at least 2048×1536, no more than 3000×2000, under 6 MB.
• Always shoot a strong front exterior so there is a compliant lead photo.
• Tell the agent about any material edit (sky swap, object removal, virtual staging) so they can disclose it.
• Hand off the MLS-compliant unbranded tour link alongside the photos.

That last point is where the photo rules and the tour rules meet. The images go to the MLS clean, and so does the tour link. For the delivery side of this — file naming, sizing, and the handoff itself — see how to deliver real estate photos.

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