Bulk Image Resizer

Batch-resize many images to a max width and download them all as one ZIP.

All images are processed entirely in your browser with canvas and never uploaded — nothing leaves your device.

Free to use — premium coming soon

FREE
  • Unlimited use
  • No watermark
  • 100% private
PREMIUM
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  • Larger batches & presets

About the Bulk Image Resizer

The Bulk Image Resizer takes a whole folder of photos and resizes every one of them to the dimensions you choose in a single pass. Instead of opening files one at a time in an editor, you drop in a batch, set a target width or height, and download the results together, often as a single ZIP. It is built for the repetitive jobs that eat time: shrinking a hundred product shots to identical thumbnails, trimming holiday photos so they actually attach to an email, or standardising a client gallery so every frame lines up. The point is consistency across many files, not perfecting one.

Reach for it whenever you have more than a couple of images that need the same treatment. Common targets include 150 px or 300 px wide for thumbnails, around 1200 px for full-width blog and content images, and smaller dimensions when you need a set of photos under a mail provider's attachment cap. Web galleries benefit because uniform sizing keeps grid layouts tidy and pages light, which helps load speed. The batch approach also removes guesswork: pick the size once and every image inherits it, so you are not eyeballing each photo or accidentally mixing dimensions across a set.

Under the hood, resizing remaps the original pixel grid onto a new one using an interpolation method such as bicubic or Lanczos, which sample nearby pixels to calculate each new pixel's colour. When you keep aspect ratio on, the tool only needs one dimension: set the width and the height is derived as new height = (new width / original width) x original height, so a 1600x1200 image becomes 800x600 with no stretching. If you instead force an exact width and height that does not match the source ratio, you choose how to reconcile it: fit, fill (crop the overflow), or pad (add borders to hit the exact size without cropping).

Because this resizer runs in your browser, the images are processed locally on your own device and are not uploaded to a server, which matters when the batch contains client work, ID scans, or unpublished product photos. On accuracy: downsizing is the safe direction and loses very little when done with a good resampler, while upscaling can only invent detail it does not have, so enlarging small originals will look soft or blocky. For best results resize from the highest-resolution source you have, and resize before compressing rather than after.

Frequently asked questions

How do I resize many images at once without distorting them?

Keep the 'maintain aspect ratio' option on and set only one dimension, usually the width. The tool calculates the matching height for each image automatically, so nothing gets stretched even if your source photos have different shapes.

What size should I resize images to for a website gallery?

Thumbnails are commonly 150 px or 300 px wide, while full-width content images are usually around 1200 px. Resize to the largest size the layout actually displays so pages stay fast without looking soft.

Will batch resizing reduce my image quality?

Making images smaller (downsizing) loses very little when a good resampler is used. Enlarging images always loses quality because the tool has to invent pixels that were never captured, so avoid upscaling small originals where possible.

What is the difference between fit, fill, and pad when resizing to an exact size?

Fit scales the image to sit inside the target box without cropping, so one dimension may fall short. Fill crops the overflow to cover the exact box, and pad adds borders to reach the exact size without cropping or distortion.

Are my images uploaded anywhere when I use this tool?

No. The resizing happens locally in your browser on your own device, so the photos are not sent to a server. That keeps client galleries, scans, and unpublished images private.

From our blog

How to Convert Excel to PDF So It Actually Fits the Page

By the Super Simple Digital Tools Team · Updated June 2026

The reason Excel-to-PDF conversions so often look wrong is that a spreadsheet has no natural sense of a page. Excel works on an effectively infinite grid of cells, while a PDF is a stack of fixed paper-sized sheets. When you convert, the tool has to decide where to cut that endless grid into pages, and it follows the print settings already stored in your workbook. If you never adjusted those settings, you get Excel's defaults, which is exactly why wide tables break across multiple pages and the last column so often ends up stranded on its own sheet.

The single most useful control lives on the Page Layout tab in the Scale to Fit group. Set Width to 1 page so your columns are squeezed horizontally to fit, but leave Height on Automatic so a long table can flow naturally down several pages. Forcing both width and height to one page is the classic mistake: it shrinks everything until the text is too small to read. If even the width does not fit comfortably, switch Orientation to Landscape first, which adds about a third more horizontal space and often solves the problem on its own.

Next, tell the tool exactly what to include by setting a print area. Highlight the real range of your table, then go to Page Layout, Print Area, Set Print Area. This matters because Excel will happily include empty cells that still carry leftover formatting, and those invisible columns are a common reason a sheet you expected to be one page wide silently splits into two. Trimming the print area also keeps stray notes, scratch calculations, or helper columns out of the document your audience sees.

With the layout sorted, decide on scope. You can convert a single active sheet, a selection of sheets, or the entire workbook, and each sheet keeps its own orientation and scaling in the final PDF. That flexibility lets you combine a landscape financial table and a portrait cover summary in one file. Tightening the margins through Page Layout, Margins, Custom Margins to around a quarter of an inch buys a little extra room when a table is right on the edge of fitting.

Finally, always preview before you commit. Excel's Print Preview, or the page count the converter shows, reveals page breaks and scaling problems while they are still easy to fix. Check that every column falls under the right header, that totals are not orphaned on a trailing page, and that the smallest text is still legible. For workbooks containing sensitive figures, run the conversion in a browser-based tool that keeps the file on your own machine, so nothing is uploaded, and a few minutes of setup turns a messy export into a polished, share-ready PDF.

  • Set Scale to Fit Width to 1 page but leave Height on Automatic, so wide tables fit horizontally without shrinking the text down to nothing.
  • Switch to Landscape orientation before anything else when a table has many columns; it adds roughly 30% more width and often fixes overflow on its own.
  • Use Page Layout, Print Area, Set Print Area to exclude blank or formatted-but-empty cells that quietly push your content onto an extra page.
  • Always use Print Preview or check the page count before converting to catch orphaned columns and illegible scaling while they are still easy to fix.

Read the full guide →

Tool by the Super Simple Digital Tools Team. Reviewed by our editorial team. Free to use, no signup required.

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