Captionx - Easy Text on Images
Captionx is a small photo editor that does one job: putting words and emoji on top of a picture. You choose an image, type a caption, give it a font, a color and a shadow, drop in a few stickers, drag everything to where it looks right and download the finished picture.
It suits the quick jobs that do not need a full design program: a caption for a social post, a label on a product photo, a joke on a pet picture, a title on a slide image or a note on a screenshot. Several captions and stickers can sit on the same photo, and each one can be moved, edited, copied or removed on its own.
Everything happens inside your browser tab. The photo is not uploaded anywhere, and the edited image is saved straight to your device as a PNG file.
The app runs entirely in your browser. What you enter is saved only on this device.
How to use Captionx
- Choose a photo. Tap Select from Gallery to pick an image file. On a phone, Take Photo may open the camera; on a computer both buttons open the file chooser. The round button at the bottom right lets you swap in a different photo later, which clears the current captions.
- Add a caption. Tap Text, type your words and set the font, size (8 to 80, in steps of 2), color, bold, italic and alignment. Turn the shadow on or off and adjust its color, blur and horizontal and vertical offset, then confirm.
- Move and edit it. Drag the caption to any spot on the photo. Tap it to select it and use the toolbar to edit the text, duplicate it or delete it.
- Add stickers. Tap Sticker and pick one of 20 emoji. Drag it into place, pinch to resize or twist to rotate on a touch screen, or use the toolbar buttons to enlarge, shrink and rotate it.
- Rotate the photo if needed. The rotate button at the top turns the picture by 90 degrees each time it is pressed.
- Download. Tap Save. The photo, captions and stickers are combined into one PNG image, and your browser downloads it.
Features
- Several independent text captions on one photo
- Eight font choices, including Roboto, Lato, Open Sans, Montserrat, Oswald, Dancing Script and Pacifico
- Font size, bold, italic and left, center or right alignment
- Free color picker for the text and for its drop shadow
- Shadow blur and horizontal and vertical offset sliders
- 20 emoji stickers that can be dragged, resized, rotated and duplicated
- Photo rotation in 90 degree steps
- Download of the finished image as a high-resolution PNG
- Interface available in many languages
Making text on photos easy to read
Contrast comes first
A caption only works if people can read it at a glance, often on a small phone screen while scrolling. The most common problem is low contrast: white text over a bright sky, or dark text over a shadowy room. Before choosing a color, look at the exact part of the photo where the words will sit, not the photo as a whole.
Light text on a dark area or dark text on a light area is the safe choice. If the background is busy, with leaves, crowds or patterns, a plain color alone may not be enough, which is where a shadow helps.
Using a drop shadow well
A soft shadow behind the letters separates them from the picture without covering it. A dark shadow with a small blur and an offset of one or two pixels gives white text a clean edge on almost any photo. Raising the blur spreads the shadow into a gentle glow that works well on detailed backgrounds.
Large offsets create a bold, poster-like effect but can look doubled on small text. If the caption starts to look fuzzy, reduce the offset before you reduce the blur.
Choosing a font for the job
Clean sans-serif fonts such as Roboto, Lato, Open Sans and Montserrat stay readable at small sizes and suit labels, instructions and informational captions. Condensed, tall fonts like Oswald fit a lot of words into a narrow space and read well as headlines.
Script fonts such as Dancing Script and Pacifico add personality for greetings, invitations and playful posts, but they get hard to read when small or in long sentences. Use them for a few words, at a generous size, and pair them with a plain font if you need a second line of detail.
Placement and the edges of the frame
Text usually looks best in calm areas of the photo: sky, a wall, a table top or empty floor. Avoid covering faces and the main subject. A common guideline is to keep important words away from the very edges, because many apps crop images into squares or tall rectangles when showing previews, and text at the border is the first thing to be cut.
Leaving some space around the words also makes them easier to read. If a caption feels crowded, try a smaller size or split it into two shorter captions placed separately.
Stickers and saving
Emoji stickers are a quick way to add mood or point at something. A few well-placed ones usually work better than many, and they should not hide what the caption is talking about.
PNG files keep sharp edges around letters, so text stays crisp. If you edit the same photo again later, keep the original file, since every new caption you add is merged into the saved image and cannot be removed afterwards.
Frequently asked questions
Is my photo uploaded to a server?
No. The image is opened and edited inside your browser tab, and the finished PNG is created on your device. Nothing is sent to a server and no account is needed.
Where is my work stored?
Only in the open page while you edit. The web version saves nothing in your browser and keeps no projects, so reloading or closing the tab discards anything you have not downloaded. Download the image before leaving.
Can I edit a caption after placing it?
Yes. Tap the caption to select it, then use the edit button to change the text and style, the copy button to duplicate it, or the delete button to remove it. Dragging moves it.
Can I crop my photo?
Not in the web version. The iPhone and Android app open a crop screen with square, 3:2, 4:3 and 16:9 options after you pick a photo. On the web the photo is used as it is, so crop it beforehand if you need a specific shape.
How do I resize a sticker with a mouse?
Select the sticker and use the zoom in and zoom out buttons in the toolbar, and the rotate button to turn it a little at a time. Pinch and twist gestures work on touch screens.
How is the web version different from the phone app?
The web version has no cropping step, downloads the image instead of opening the share sheet, and has no premium upgrade, purchase restore or in-app review. The editing tools, fonts and stickers are the same.
Which image formats can I open?
Any image your browser can display, such as JPEG, PNG, WebP or GIF (the first frame). The result is always saved as PNG.
Limitations of the web version
- There is no crop step on the web; the photo is used at its original framing
- The edited image is downloaded as a PNG instead of opening a share sheet
- Work is not saved between visits; download before closing the tab
- Fonts are loaded from the internet the first time they are used, so a connection is needed
- Premium options from the phone app are not offered on the web
Phone app
Captionx is also available as an app for phones and tablets: