What's a place map?
Placeholdr image is a temporary picture used to maintain the page structure while the real picture, header or commodity material is not ready. It usually contains fixed text of width, simple background and size, can pre-empt the picture area and helps developers check lists, cards, article cover and responsive layouts. The place map is not final material and should be replaced with a content-related picture and an accurate alt text for the official picture.
Fixed-size bitmaps are easier to reproduce layout problems than writing a text directly or using random pictures. Designers can use the same set of specification delivery line drafts, the front end can continue to connect while interface data is not complete, and testers can also observe the stability of the picture area at different screen widths. For pages that require a picture location, the pre-defined width and height also reduce the layout of the image after loading.
What can this tool generate?
- Custom size:Enter the width and height directly, or use 1080p, OG Image, 4:3, 1:1 and vertical presets to quickly obtain a canvas that matches the layout.
- Custom Appearance:Select background colour, text colour and display of the text file; The file is not filled in, the current canvas is wide x high, allowing for the identification of different place maps.
- Various Exportes:Supports PNG, JPEG and WebP downloads and can also copy Data URLs or analog links for the development of demonstrations.
- Locally generated:Draws with HTML5 Canvas in the current browser without uploading a photo file, without relying on an account number or a back-office job.
How to make a place map
- Fill in the width and height of the target area first. The cover of articles, OG pictures, headers and mobile phone posters usually require different long-width ratios, giving priority to page or platform pixel dimensions.
- If size is common, click 1080p, OG Image, 4:3, 1:1 or vertical preset, and fine-tune the values according to the actual layout.
- Select the background and text colour that are sufficiently contrasted to the page background, filling in the name of the module, the type of picture or other identification file, if necessary.
- Click to download a high-resolution picture after selecting PNG, JPEG or WebP. Copy Data URLs when embedded in test codes is required; If you need to simulate a remote picture address, you can copy the analog link.
What about size and format?
Select Size by Page scene
OG Image presets social sharing cards and web-page sharing diagrams: 1:1 for headers, commodity thumbnails and square cards, 1080p for wide screen demonstrations or video cover, and vertical screen presets for mobile posters and short video cover. If you only test the list of articles, it is more valuable to use a width greater than a random size using a picture close to the real one. Sizes do not need to be set blindly large, based first on CSS width and equipment pixels for the final display area.
Select Format By Content
PNG suitable for a place map that requires clear text, simple graphics or transparent background; JPEG temporary materials and smaller documents suitable for photo style; WebP usually reduces size while maintaining clarity. The place map is used only for the development of previews, giving preference to formats that are easily recognized by team tools and browsers. The compression ratio and load performance should be reassessed on the basis of real pictures before official access.
Use with other graphic tools
The generation of the map is usually the first step in the flow of pictures. If you need to change the material generated to a fixed image ratio, you can continue using it. Online Photo Crop Tool； Need to align output pixel sizes, available Picture Size Adjustment Tool。 If the test material is too big, use it again. Picture compression tool(b) Checking volume; Use when switching between PNG, JPEG and WebP Picture Formatting Tool。 These tools are locally processed by browsers and are suitable for quick validation of the photo process on the web page.
If the material already contains personal information or an interface screenshot that has not yet been made public, it is suggested that the need to block sensitive areas be confirmed before a decision is taken to export. The placeholder map itself will not read or upload your original picture, but after copying Data URL or simulated links to a third-party project, it should be used in accordance with the project ' s terms of reference and data management rules.
Use restrictions and issuance of recommendations
The pictures generated by this tool only exist in the current browser session and will not be saved by the website after the page is refreshed or the tab is closed. Canvas generation relies on browser memory, which can slow down page responses when width and height are set too high; This can be done by reducing sizes or by creating materials in batches. Simulation links are designed to help the front-end demonstrate fixed size and path formats, and do not mean that there is a real corresponding file on the server. The production environment should download pictures and deploy them to its own static resource server or CDN.
The development phase could use a bitmap to check loading, empty, error and CLS in components; The release phase is replaced by a contented picture confirming the volume, clarity, colour and copyright source after compression. For important SEO content pictures, file names, alt text, the surrounding text and real picture themes should be consistent and cannot be replaced with temporary text cases such as “800 x 600” for a long period of time.
FAQ
The picture will be passed on to the server?
No, I won't. The tool only uses Canvas to create local position maps and export from the browser, which does not require uploading of photo files or login accounts.
Can analogue links be used directly in the production environment?
Not recommended. Simulation links are only suitable for demonstrating URL structures and position effects, and the production environment is first requested to download the resulting images and then place them on a own server or CDN, with a long-term stable resource address.
What formats are supported?
Support for PNG, JPEG and WebP is currently available. PNG is better suited to clear text and transparent effects, JPEG and WebP are better suited to control the volume of the file, and the final format should be selected in conjunction with the compatibility and performance requirements of the project.
What is the default text?
If the custom text is not completed, the canvas displays the current width and height, such as " 800 x 600 " . This allows for quick identification of images of different sizes when pageshots or interfaces are linked.