Recortamos la imagen sin que pierda resolución.

Recortamos can mean either:

• we crop / we are cropping (present)
• we cropped (preterite)

Spanish has the same form for both in the nosotros form of many -ar verbs.

In this sentence, the most natural reading is usually the present: we crop the image without it losing resolution.
Context would tell you if it was past instead.

Here, recortar means to crop or to trim, especially with an image.

So recortamos la imagen means something like:

• we crop the image
• we trim the image

In image-editing contexts, recortar is the normal verb for cropping.

In Spanish, direct objects often take the definite article when English might not emphasize it as much.

So:

• Recortamos la imagen = We crop the image

The article la shows that imagen is a specific image, not just images in general.

Because sin que is followed by the subjunctive, not the indicative.

So you get:

• sin que pierda

not:

• sin que pierde

This is a very common pattern in Spanish:

• sin que + subjunctive

The idea is that the action in the second clause is something that is avoided or does not happen.
Here, the image is cropped without the image losing resolution.

Pierda is the present subjunctive of perder.

It is used because of sin que. After sin que, Spanish normally uses the subjunctive to express something that does not occur or is being prevented.

So:

• sin que pierda resolución = without it losing resolution

The sentence is not stating that the image actually loses resolution. It says the opposite: the cropping happens without that happening.

The subject of pierda is la imagen.

So the structure is:

• Recortamos la imagen = We crop the image
• sin que pierda resolución = without [the image] losing resolution

Even though la imagen is not repeated, Spanish often leaves it understood when it is clear from context.

Because perder is a stem-changing verb.

Its present subjunctive forms are:

• yo pierda
• tú pierdas
• él/ella/usted pierda
• nosotros/nosotras perdamos
• vosotros/vosotras perdáis
• ellos/ellas/ustedes pierdan

So pierda is the correct form for la imagen because la imagen is third person singular.

Both are possible in Spanish, but they are used a bit differently.

sin perder resolución

This is a more compact structure with an infinitive:

• without losing resolution

sin que pierda resolución

This uses a full clause with its own subject, even if the subject is implied:

• without it losing resolution

In this sentence, pierda refers to la imagen, so sin que pierda resolución makes that relationship clearer.

A native speaker might also say:

• Recortamos la imagen sin perder resolución

That is also natural, especially when the meaning is obvious.

Because in Spanish, abstract or uncountable nouns often appear without an article in this kind of expression.

So:

• pierda resolución = lose resolution

This sounds natural in Spanish, just like:

• perder calidad = to lose quality
• tener paciencia = to have patience

You could sometimes hear la resolución in other contexts, but here the zero article is the most natural choice.

Yes. In image and screen contexts, resolución means resolution.

Examples:

• alta resolución = high resolution
• baja resolución = low resolution
• perder resolución = to lose resolution

So this is a very direct vocabulary match.

You could say:

• Recortamos la imagen para que no pierda resolución

But the meaning changes slightly.

sin que pierda resolución

Focuses on what happens without a negative result occurring.

para que no pierda resolución

Focuses more on the purpose:
we crop the image so that it doesn’t lose resolution

So both are grammatical, but sin que emphasizes the absence of that unwanted result, while para que no emphasizes intention or purpose.

Not by itself. Recortamos is normally understood as we crop or we cropped, depending on context.

If you want let’s crop the image, Spanish usually says:

• Recortemos la imagen

That is the subjunctive used as a command for nosotros.

So:

• Recortamos la imagen = We crop / We cropped the image
• Recortemos la imagen = Let’s crop the image

Yes, it sounds natural in Spain Spanish.

It is a normal, clear sentence for talking about image editing or digital processing.
A speaker from Spain would understand it immediately, and the grammar is standard.