The micro-blogging website Tumblr and the animated GIF may be two peas in a pod, but sometimes larger GIFs will not animate properly because of Tumblr's limit on their file size. Tumblr limits GIFs to 1 megabyte or less and sets limitations on the width of the image by not properly displaying GIFs greater than 500 pixels wide. Several free online services exist that allow users to reduce the size of GIFs so the animation will work properly on Tumblr.

Using GIF Reducer

Step 1

Navigate to the GIF Reducer's website (link in Resources).

Step 2

Click "Choose File" and select the GIF you want to reduce. The GIF Reducer only allows GIFs that are a maximum size of 2MB.

Step 3

Click "Reduce It."

Step 4

Click "View the reduced images" to produce four different GIFs of varying color reductions, with the last being the one that was reduced the most.

Step 5

Right-click the image that best meets Tumblr's standard and select "Save Image As."

Using EZ Gif

Step 1

Navigate to EZGIF.com and select the GIF Resize option.

Step 2

Click "Choose File" and select the GIF you want to reduce. EZ GIF allows uploads of up to 12MB.

Step 3

Click "Upload" and the GIF will appear on the page with several options above it.

Step 4

Crop the GIF by clicking "Crop" if there is a portion of the GIF that could be removed. Drag the cursor over the portion of the GIF you want to keep then click "Crop it!"

Step 5

Click "Resize" to reduce the GIF's width and height. Remember that Tumblr requires GIFs be no larger than 500 pixels in width. Resizing significantly reduces the file's size. Type "auto" for the height to maintain proportions when reducing the width.

Step 6

Use "Optimize" to reduce the color of the GIF. Set the colors to a lower variation, as listed on the page, to reduce the file size. With 256 colors, the file is at its largest and at its smallest with only eight colors. This significantly affects the quality of the GIF.

Step 7

Try a combination of resizing, cropping and optimization to reduce large GIF files to the necessary 1MB limit.

Step 8

Click "Save" when finished.

Using Online Image Editor

Step 1

Navigate to the Online Image Editor's website (link in Resources).

Step 2

Click "Choose File" under the "Upload" tab.

Step 3

Click the "Resize during upload" box and select a percentage to automatically reduce the size of the GIF during the upload process.

Step 4

Click "Wizards" at the top of the page once the GIF is uploaded. Then select "GIF Only."

Step 5

Click the button next to "Reduce Colours" to lower the number of colors used in the file.

Step 6

Click "GIF Only" again to bring up the options again. Select "Remove every 2nd frame from GIF" to eliminate excessive frames in large GIFs and dramatically reduce the size of the file.

Step 7

Right click the GIF and select "Save Image As."

Upload Reduced GIF to Tumblr

Step 1

Click "Photo" from the Tumblr dashboard. This will upload either animated or non-animated GIFs as long as it meets Tumblr's size standard.

Step 2

Click the camera with a plus symbol over it. Select the GIF and click "Open."

Step 3

Click "Post." A GIF that exceeds the file size or pixel width limits will not upload.