diff --git a/db/files.js b/db/files.js
index 9f07dff5..81ebc0a3 100644
--- a/db/files.js
+++ b/db/files.js
@@ -16,6 +16,9 @@ module.exports = {
 			'$inc': {
 				'count': 1
 			},
+			'$addToSet': {//save list of thumb exts incase config is changed to track old exts
+				'exts': file.thumbextension,
+			},
 			'$setOnInsert': {
 				'size': file.size
 			}
diff --git a/gulp/res/js/post.js b/gulp/res/js/post.js
index afff16c9..cb03666b 100644
--- a/gulp/res/js/post.js
+++ b/gulp/res/js/post.js
@@ -83,7 +83,7 @@ pug_html = pug_html + "\u003Cimg class=\"file-thumb\" src=\"\u002Fimg\u002Fspoil
 }
 else
 if (file.hasThumb) {
-pug_html = pug_html + "\u003Cimg" + (" class=\"file-thumb\""+pug_attr("src", `/img/thumb-${file.hash}.jpg`, true, false)+pug_attr("height", file.geometry.thumbheight, true, false)+pug_attr("width", file.geometry.thumbwidth, true, false)) + "\u002F\u003E";
+pug_html = pug_html + "\u003Cimg" + (" class=\"file-thumb\""+pug_attr("src", `/img/thumb-${file.hash}${file.thumbextension}`, true, false)+pug_attr("height", file.geometry.thumbheight, true, false)+pug_attr("width", file.geometry.thumbwidth, true, false)) + "\u002F\u003E";
 }
 else {
 pug_html = pug_html + "\u003Cimg" + (" class=\"file-thumb\""+pug_attr("src", `/img/${file.filename}`, true, false)+pug_attr("height", file.geometry.height, true, false)+pug_attr("width", file.geometry.width, true, false)) + "\u002F\u003E";
@@ -105,7 +105,7 @@ pug_html = pug_html + "\u003Cimg class=\"file-thumb\" src=\"\u002Fimg\u002Fspoil
 }
 else
 if (file.hasThumb) {
-pug_html = pug_html + "\u003Cimg" + (" class=\"file-thumb\""+pug_attr("src", `/img/thumb-${file.hash}.jpg`, true, false)+pug_attr("height", file.geometry.thumbheight, true, false)+pug_attr("width", file.geometry.thumbwidth, true, false)) + "\u002F\u003E";
+pug_html = pug_html + "\u003Cimg" + (" class=\"file-thumb\""+pug_attr("src", `/img/thumb-${file.hash}${file.thumbextension}`, true, false)+pug_attr("height", file.geometry.thumbheight, true, false)+pug_attr("width", file.geometry.thumbwidth, true, false)) + "\u002F\u003E";
 }
 else {
 pug_html = pug_html + "\u003Cimg" + (" class=\"file-thumb\""+pug_attr("src", `/img/${file.filename}`, true, false)+pug_attr("height", file.geometry.height, true, false)+pug_attr("width", file.geometry.width, true, false)) + "\u002F\u003E";
diff --git a/helpers/files/deletepostfiles.js b/helpers/files/deletepostfiles.js
index 39b04347..2c16ff8d 100644
--- a/helpers/files/deletepostfiles.js
+++ b/helpers/files/deletepostfiles.js
@@ -7,10 +7,12 @@ module.exports = (files) => {
 
 	//delete all the files and thumbs
 	return Promise.all(files.map(async file => {
-		return Promise.all([
-			remove(`${uploadDirectory}/img/${file.filename}`),
-			remove(`${uploadDirectory}/img/thumb-${file.hash}.jpg`)
-		]).catch(e => console.error)
+		return Promise.all(
+			[remove(`${uploadDirectory}/img/${file.filename}`)]
+			.concat(file.exts.map(ext => {
+				remove(`${uploadDirectory}/img/thumb-${file.hash}${file.thumbextension}`)
+			}))
+		).catch(e => console.error)
 	}));
 
 }
diff --git a/helpers/files/imagethumbnail.js b/helpers/files/imagethumbnail.js
index d05b71b9..268dc2ac 100644
--- a/helpers/files/imagethumbnail.js
+++ b/helpers/files/imagethumbnail.js
@@ -5,9 +5,9 @@ const gm = require('gm')
 module.exports = (file) => {
 
 	return new Promise((resolve, reject) => {
-		gm(`${uploadDirectory}/img/${file.filename}`)
+		gm(`${uploadDirectory}/img/${file.filename}[0]`) //0 for first gif frame
 		.resize(128, 128)
-		.write(`${uploadDirectory}/img/thumb-${file.hash}.jpg`, function (err) {
+		.write(`${uploadDirectory}/img/thumb-${file.hash}${configs.thumbExtension}`, function (err) {
 			if (err) {
 				return reject(err);
 			}
diff --git a/helpers/files/videothumbnail.js b/helpers/files/videothumbnail.js
index 59f13c24..e492dfb6 100644
--- a/helpers/files/videothumbnail.js
+++ b/helpers/files/videothumbnail.js
@@ -12,7 +12,7 @@ module.exports = (file, geometry) => {
 		.screenshots({
 			timestamps: ['1%'],//1% should remedy black first frames or fade-ins
 			count: 1,
-			filename: `thumb-${file.hash}.jpg`,
+			filename: `thumb-${file.hash}${thumbExtension}`,
 			folder: `${uploadDirectory}/img/`,
 			size: geometry.width > geometry.height ? '128x?' : '?x128'
 			//keep aspect ratio, but also making sure taller/wider thumbs dont exceed 128 in either dimension
diff --git a/models/forms/makepost.js b/models/forms/makepost.js
index 75abad8e..84186ff7 100644
--- a/models/forms/makepost.js
+++ b/models/forms/makepost.js
@@ -27,7 +27,7 @@ const path = require('path')
 	, msTime = require(__dirname+'/../../helpers/mstime.js')
 	, deletePosts = require(__dirname+'/deletepost.js')
 	, spamCheck = require(__dirname+'/../../helpers/checks/spamcheck.js')
-	, { postPasswordSecret } = require(__dirname+'/../../configs/main.json')
+	, { thumbExtension, postPasswordSecret } = require(__dirname+'/../../configs/main.json')
 	, buildQueue = require(__dirname+'/../../queue.js')
 	, dynamicResponse = require(__dirname+'/../../helpers/dynamic.js')
 	, { buildThread } = require(__dirname+'/../../helpers/tasks.js');
@@ -160,13 +160,15 @@ module.exports = async (req, res, next) => {
 					originalFilename: file.name,
 					mimetype: file.mimetype,
 					size: file.size,
+					extension,
+					thumbextension: thumbExtension,
 			};
 
 			await Files.increment(processedFile);
 
 			//check if already exists
 			const existsFull = await pathExists(`${uploadDirectory}/img/${processedFile.filename}`);
-			const existsThumb = await pathExists(`${uploadDirectory}/img/thumb-${processedFile.hash}.jpg`);
+			const existsThumb = await pathExists(`${uploadDirectory}/img/thumb-${processedFile.hash}${processedFile.thumbextension}`);
 
 			//handle video/image ffmpeg or graphicsmagick
 			switch (processedFile.mimetype.split('/')[0]) {
@@ -199,7 +201,7 @@ module.exports = async (req, res, next) => {
 						});
 					}
 					processedFile.duration = videoData.format.duration;
-					processedFile.durationString = new Date(videoData.format.duration*1000).toLocaleString('en-US', {hour12:false}).split(' ')[1].replace(/^00:/, '');
+					processedFile.durationString = new Date(videoData.format.duration*1000).toLocaleString('en-US', {hour12:false}).split(' ')[1].replace(/^00:/, '');//break for over 24h video
 					processedFile.geometry = {width: videoData.streams[0].coded_width, height: videoData.streams[0].coded_height} // object with width and height pixels
 					processedFile.sizeString = formatSize(processedFile.size) // 123 Ki string
 					processedFile.geometryString = `${processedFile.geometry.width}x${processedFile.geometry.height}` // 123 x 123 string
diff --git a/schedules/index.js b/schedules/index.js
index 975e6ca2..ba980261 100644
--- a/schedules/index.js
+++ b/schedules/index.js
@@ -24,7 +24,7 @@ const msTime = require(__dirname+'/../helpers/mstime.js')
 	//update webring
 	if (enableWebring) {
 		const updateWebring = require(__dirname+'/webring.js');
-		updateWebring().catch(e => console.error);
+//		updateWebring().catch(e => console.error);
 		setInterval(() => {
 			updateWebring().catch(e => console.error);
 		}, msTime.hour);
diff --git a/schedules/prune.js b/schedules/prune.js
index cf3a3341..4b93ee69 100644
--- a/schedules/prune.js
+++ b/schedules/prune.js
@@ -15,18 +15,18 @@ module.exports = async() => {
 			'count': 0,
 			'size': 0
 		}
-	}).toArray().then(res => {
-		return res.map(x => x._id);
-	});
+	}).toArray()
 	await Files.db.removeMany({
 		'count': {
 			'$lte': 0
 		}
 	});
-	await Promise.all(files.map(async filename => {
-		return Promise.all([
-			remove(`${uploadDirectory}/img/${filename}`),
-			remove(`${uploadDirectory}/img/thumb-${filename.split('.')[0]}.jpg`)
-		])
+	await Promise.all(files.map(async file => {
+		return Promise.all(
+			[remove(`${uploadDirectory}/img/${file._id}`)]
+			.concat(file.exts.map(ext => {
+				remove(`${uploadDirectory}/img/thumb-${file._id.split('.')[0]}${ext}`)
+			}))
+		)
 	}));
 }
diff --git a/views/mixins/catalogtile.pug b/views/mixins/catalogtile.pug
index 8689e1f1..4361d9c0 100644
--- a/views/mixins/catalogtile.pug
+++ b/views/mixins/catalogtile.pug
@@ -17,7 +17,7 @@ mixin catalogtile(board, post, index)
 						img.catalog-thumb(src='/img/spoiler.png' width='64' height='64')
 					else
 						if post.files[0].hasThumb
-							img.catalog-thumb(src=`/img/thumb-${post.files[0].hash}.jpg` width='64' height='64')
+							img.catalog-thumb(src=`/img/thumb-${post.files[0].hash}${post.files[0].thumbextension}` width='64' height='64')
 						else
 							img.catalog-thumb(src=`/img/${post.files[0].filename}` width='64' height='64')
 		if post.message
diff --git a/views/mixins/post.pug b/views/mixins/post.pug
index dc6f6f36..3a3cb816 100644
--- a/views/mixins/post.pug
+++ b/views/mixins/post.pug
@@ -61,7 +61,7 @@ mixin post(post, truncate, manage=false, globalmanage=false, ban=false)
 									if post.spoiler
 										img.file-thumb(src='/img/spoiler.png' width='128' height='128')
 									else if file.hasThumb
-										img.file-thumb(src=`/img/thumb-${file.hash}.jpg` height=file.geometry.thumbheight width=file.geometry.thumbwidth)
+										img.file-thumb(src=`/img/thumb-${file.hash}${file.thumbextension}` height=file.geometry.thumbheight width=file.geometry.thumbwidth)
 									else
 										img.file-thumb(src=`/img/${file.filename}` height=file.geometry.height width=file.geometry.width)
 			- let truncatedMessage = post.message;
diff --git a/views/pages/thread.pug b/views/pages/thread.pug
index 8b50021d..64462182 100644
--- a/views/pages/thread.pug
+++ b/views/pages/thread.pug
@@ -14,7 +14,7 @@ block head
 		if thread.spoiler
 			meta(property='og:image', content='/img/spoiler.png')
 		else if thread.files[0].hasThumb === true
-			meta(property='og:image', content=`/img/thumb-${thread.files[0].hash}.jpg`)
+			meta(property='og:image', content=`/img/thumb-${thread.files[0].hash}${thread.files[0].thumbextension}`)
 		else
 			meta(property='og:image', content=`/img/${thread.files[0].filename}`)