Free tools for thumbnails & social images
Small, fast utilities we built for our own workflow. Every one of them runs entirely inside your browser — no account, no watermark, no upload, no limit on how many times you use them.
Tool of the day
November 14, 2026Color Palette Extractor
Pull the dominant colors out of any image as hex, RGB or CSS variables — with contrast checks built in.
Top 3 tools
YouTube Thumbnail Downloader
Paste any YouTube link and pull the thumbnail in every size YouTube stores, up to full 1280×720.
Open tool →Thumbnail Text Adder
Drop an image, add bold outlined text, download a finished 1280×720 thumbnail. No editor needed.
Open tool →Thumbnail Preview & Safe Zones
Check your thumbnail at real YouTube sizes — feed, mobile, sidebar, end screen — with safe zones and a squint test.
Open tool →Create & edit
Video Frame Grabber
Scrub your video, grab any frame, and save it at 1280×720 — or auto-grab six across the whole clip.
Open tool →Add Outline to Image
Put a clean white or coloured stroke around a transparent cutout — the outlined-subject look from thumbnails — and download it as a PNG.
Open tool →YouTube Script Timer
Paste a script, measure your own speaking pace and see the runtime of every section before you record.
Open tool →Image Combiner
Put two to four images side by side, stacked or in a grid, with labels and a divider, sized for a YouTube thumbnail.
Open tool →Add Watermark to Image
Put your channel name or logo on any image, in a corner or tiled across it, and download it at the original size.
Open tool →Blur Image
Blur, pixelate or black out any part of an image, or blur everything except your subject, and download it at full size.
Open tool →Add Border to Image
Frame any image with a solid border and an optional inner line, outside the picture or inside it at the same size.
Open tool →Adjust Image Brightness
Brighten a dark photo or frame, add contrast, boost or mute the colour and warm it up, with a live before and after.
Open tool →Crop Image
Drag a box or type exact pixels to crop any image to 16:9, 9:16, square or a custom ratio, and download it at full quality.
Open tool →YouTube Profile Picture Maker
Frame a photo or logo inside YouTube's circle, see it at feed size on light and dark, and download a clean square with no watermark.
Open tool →Remove White Background
Turn the white or plain-colour background of a logo, icon or product shot transparent and download a PNG you can drop onto a thumbnail.
Open tool →Sharpen Image
Crisp up a soft photo or video frame with an unsharp mask you control, with a before and after and a halo warning.
Open tool →Research & packaging
YouTube Title Checker
See where your title gets cut off on every surface, and check length, keyword placement and caps.
Open tool →YouTube Description Generator
Build a description that ranks — keyword above the fold, valid chapters, clean hashtags and tags inside 500 characters.
Open tool →YouTube Money Calculator
Turn your views and the RPM from YouTube Studio into daily, monthly and yearly earnings, with Shorts kept separate.
Open tool →YouTube Engagement Rate Calculator
Turn a video's views, likes, comments and shares into an engagement rate, then compare a batch of videos against your own median.
Open tool →YouTube Watch Time Calculator
Turn each video's views and average view duration into watch hours, then see how many views stand between you and 4,000 or 8,000.
Open tool →Check & compare
Banner Safe Zone Checker
See the crop YouTube applies on TV, desktop, tablet and mobile — with the 1546×423 safe area marked.
Open tool →Thumbnail A/B Comparison
Put two versions head to head at 360, 246 and 168 pixels — with blur, grayscale and measured contrast.
Open tool →Color Contrast Checker
Check any text and background colour pair against the WCAG ratios, sample both straight from your thumbnail, and get the nearest colour that passes.
Open tool →Resize, convert & utilities
Social Media Image Resizer
One image in, every platform size out — YouTube, Instagram, TikTok, X, Facebook, LinkedIn and Pinterest.
Open tool →Image Compressor
Shrink images to an exact target size — built for YouTube's 2 MB thumbnail limit. Batch, no quality cliff.
Open tool →Image Format Converter
Convert between PNG, JPG and WebP in batches, with proper handling of transparency.
Open tool →Flip Image
Mirror an image either way, turn it a quarter at a time or straighten a tilt, and download it at its original size.
Open tool →YouTube Timestamp Link Generator
Turn any YouTube link and a time into a link that starts at that moment, plus embed code and a batch of links for a pinned comment.
Open tool →Aspect Ratio Calculator
Get the missing width or height for 16:9, 9:16 or any ratio, or find the simplified and nearest common ratio of any size.
Open tool →Why these run in your browser
Every tool on this page uses the same two browser APIs your image editor would: the File API to read the image you pick, and Canvas to redraw it. The work happens on your own machine, so the file you drop in is never sent to us or to anyone else. Close the tab and it is gone.
That has practical upsides beyond privacy. There is no queue and no rate limit, batches of twenty images are as cheap as one, and everything keeps working on a plane once the page has loaded.
What they are good for
- Making. Take a frame out of your own footage and put big, outlined text on it — a finished 1280×720 thumbnail without opening an editor.
- Research. Pull the thumbnail off any video and study what the top results in your niche are doing.
- Quality control. Check your thumbnail at the size it will actually be seen — a sidebar suggestion is 168 pixels wide, not 1280 — and put two versions head to head before you upload.
- Packaging. Measure the title against where each surface truncates it, and write a description with the keyword above the fold, chapters YouTube will actually accept, and tags inside the 500-character budget.
- Repurposing. Take one hero image and cut it to every aspect ratio a platform expects.
- Housekeeping. Get under YouTube's 2 MB limit, swap formats, and lift a palette so your channel stays visually consistent.
When you want the thumbnail itself designed rather than processed, that is what Thumblore does — and the blog covers the design rules behind high click-through thumbnails.
Need the thumbnail made, not just resized?
Thumblore turns a video title into a finished 1280×720 thumbnail in seconds — your face, your brand, no editor required.
Generate a free thumbnail