Tutorial 094Design Tools14 steps4 fixes

How to Resize an Image for the Web in Photoshop

A beginner, interface-by-interface guide to resize an image for the web in photoshop, including what each design term means, where to click and how to verify the exported/resulting asset.

By the end: You will complete resize an image for the web in photoshop and keep an editable source plus a checked output.

TARGET RESULTHow to Resize an Image for the Web in Photoshop
You will complete resize an image for the web in photoshop and keep an editable source plus a checked output.

Key terms before you start

These definitions make the steps easier to follow and help distinguish controls, files and concepts that can look similar at first.

Raster imageAn image made from a grid of pixels, such as a photograph.

Pixel dimensionsRaster width and height in pixels; for the web these directly affect detail and often file size.

ExportCreating a delivery file such as PNG/JPEG/WebP from an editable working file.

LayerAn independently editable object in an image/design document; Photoshop and GIMP stack layers.

Layer maskA grayscale visibility control attached to a layer; white reveals, black hides and gray partially reveals without deleting source pixels.

What you need before starting

Access to Photoshop
A source/project you are allowed to edit
A clear final destination/size/use for the result

FULL TUTORIAL

Step-by-step tutorial

Every step is shown below. Work through them in order and use each checkpoint to confirm the result before moving on.

STEP 01 / 14

Open Photoshop and use a safe working copy

Do this

Open the real project in Photoshop. Duplicate the file/document first if the tutorial could alter important source work.

Why

The editable source is different from the final exported asset; preserve recoverability.

ExportCreating a delivery file such as PNG/JPEG/WebP from an editable working file.

IF THIS GOES WRONGThe exported result differs from the canvas

Inspect export dimensions, transparency, crop, color and output format; judge the exported file as the final artifact.

CHECKPOINTA working copy or recoverable source is open.

STEP 02 / 14

Identify the final destination

Do this

Write where the result will be used: website width, social platform, handoff, print, prototype, etc.

Why

Dimensions, color, format and responsive behavior depend on destination.

Pixel dimensionsRaster width and height in pixels; for the web these directly affect detail and often file size.

IF THIS GOES WRONGThe exported result differs from the canvas

Inspect export dimensions, transparency, crop, color and output format; judge the exported file as the final artifact.

CHECKPOINTThe target is explicit.

STEP 03 / 14

Know the destination pixel width

Do this

Measure/decide maximum rendered width on website.

Why

Web images are displayed in CSS/device pixels; giant originals increase transfer/storage.

Pixel dimensionsRaster width and height in pixels; for the web these directly affect detail and often file size.

CHECKPOINTTarget width is known.

STEP 04 / 14

Duplicate/preserve original

Do this

Use a copy or keep original file separately.

Why

Resampling down discards pixel data.

Pixel dimensionsRaster width and height in pixels; for the web these directly affect detail and often file size.

IF THIS GOES WRONGThe exported result differs from the canvas

Inspect export dimensions, transparency, crop, color and output format; judge the exported file as the final artifact.

CHECKPOINTHigh-resolution source is preserved.

STEP 05 / 14

Open Image → Image Size

Do this

Use Photoshop menu Image → Image Size.

Why

This dialog controls pixel dimensions/resolution/resampling.

Pixel dimensionsRaster width and height in pixels; for the web these directly affect detail and often file size.

IF THIS GOES WRONGThe exported result differs from the canvas

Inspect export dimensions, transparency, crop, color and output format; judge the exported file as the final artifact.

CHECKPOINTImage Size dialog opens.

STEP 06 / 14

Choose pixels for web dimensions

Do this

Set width/height units to Pixels.

Why

Print resolution units are not the primary determinant of web display size.

Pixel dimensionsRaster width and height in pixels; for the web these directly affect detail and often file size.

IF THIS GOES WRONGThe exported result differs from the canvas

Inspect export dimensions, transparency, crop, color and output format; judge the exported file as the final artifact.

CHECKPOINTDimensions shown in pixels.

STEP 07 / 14

Keep aspect ratio linked

Do this

Keep constrain-proportions/link enabled unless intentional distortion/crop is required.

Why

Changing one dimension updates other proportionally.

IF THIS GOES WRONGThe exported result differs from the canvas

Inspect export dimensions, transparency, crop, color and output format; judge the exported file as the final artifact.

CHECKPOINTImage is not stretched.

STEP 08 / 14

Enter target width

Do this

Type required pixel width; inspect resulting height.

Why

Do not upscale a tiny source expecting real new photographic detail.

Pixel dimensionsRaster width and height in pixels; for the web these directly affect detail and often file size.

IF THIS GOES WRONGYou edited the wrong layer/frame

Undo, then select the target through Layers panel and verify its name before editing.

CHECKPOINTDimensions match target.

STEP 09 / 14

Choose resampling method/default appropriate to Photoshop version

Do this

Leave a sensible automatic method unless you have a measured reason to change.

Why

Resampling determines how pixels are recalculated.

Raster imageAn image made from a grid of pixels, such as a photograph.

CHECKPOINTPreview remains acceptable.

STEP 10 / 14

Confirm and inspect at 100%

Do this

Click OK then view around 100%.

Why

Judge sharpness/details at actual pixel scale.

Pixel dimensionsRaster width and height in pixels; for the web these directly affect detail and often file size.

IF THIS GOES WRONGThe exported result differs from the canvas

Inspect export dimensions, transparency, crop, color and output format; judge the exported file as the final artifact.

CHECKPOINTNo unacceptable artifacts.

STEP 11 / 14

Save/export a web copy

Do this

Use Export As/Quick Export workflow for delivery format.

Why

Do not overwrite only master with compressed web version.

ExportCreating a delivery file such as PNG/JPEG/WebP from an editable working file.

IF THIS GOES WRONGThe exported result differs from the canvas

Inspect export dimensions, transparency, crop, color and output format; judge the exported file as the final artifact.

CHECKPOINTSeparate web file exists.

STEP 12 / 14

Check file dimensions outside Photoshop

Do this

Inspect properties/browser after export.

Why

Confirms delivery file, not document, has correct size.

ExportCreating a delivery file such as PNG/JPEG/WebP from an editable working file.

IF THIS GOES WRONGThe exported result differs from the canvas

Inspect export dimensions, transparency, crop, color and output format; judge the exported file as the final artifact.

CHECKPOINTOutput dimensions match.

STEP 13 / 14

Open the exported/result outside the editor

Do this

Inspect the actual PNG/JPEG/SVG/prototype/output rather than assuming it matches the canvas.

Why

Exports can change dimensions, transparency, font rendering or compression.

ExportCreating a delivery file such as PNG/JPEG/WebP from an editable working file.

IF THIS GOES WRONGThe exported result differs from the canvas

Inspect export dimensions, transparency, crop, color and output format; judge the exported file as the final artifact.

CHECKPOINTOutput is correct.

STEP 14 / 14

Store source and delivery files predictably

Do this

Use clear names/versioning and keep the source separate from public delivery assets.

Why

Future revisions should start from editable source.

ExportCreating a delivery file such as PNG/JPEG/WebP from an editable working file.

IF THIS GOES WRONGYou lost editability

Return to the layered/component source or backup. Keep future export/flatten operations on separate delivery copies.

CHECKPOINTFiles can be found/reused.

Concrete examples

Beginner ruleAlways know whether you are editing source structure or generating a delivery copy.

Troubleshooting

You edited the wrong layer/frame

Undo, then select the target through Layers panel and verify its name before editing.

The exported result differs from the canvas

Inspect export dimensions, transparency, crop, color and output format; judge the exported file as the final artifact.

A long label/content breaks the design

Use Auto Layout/flexible components or revise layout constraints rather than shrinking type until it barely fits.

You lost editability

Return to the layered/component source or backup. Keep future export/flatten operations on separate delivery copies.

FINAL CHECKStore source and delivery files predictably
Files can be found/reused.

Public discussion excerpts

How the topic comes up in practice

Short excerpts from public discussions that directly relate to the task. Use the source link for the complete context.

“WebP is currently the best all-around choice for modern browsers, great size savings, widely supported.”
WebP vs AVIF vs PNG vs JPG ↗

Documentation and references

Use these primary and supporting sources to verify current controls, browser behavior and product-specific details.

← How to Use a Layer Mask for Nondestructive Editing in Photoshop How to Export Web Graphics From Photoshop →

Key terms before you start

What you need before starting

Step-by-step tutorial

Open Photoshop and use a safe working copy

Identify the final destination

Know the destination pixel width

Duplicate/preserve original

Open Image → Image Size

Choose pixels for web dimensions

Keep aspect ratio linked

Enter target width

Choose resampling method/default appropriate to Photoshop version

Confirm and inspect at 100%

Save/export a web copy

Check file dimensions outside Photoshop

Open the exported/result outside the editor

Store source and delivery files predictably

Concrete examples

Troubleshooting

How the topic comes up in practice

Continue with these tutorials

Documentation and references