{"$schema":"https://toolsly.tools/schemas/tool-manifest-v1.json","generated":"2026-05-20T20:47:38.008Z","discovery":{"catalog":"https://toolsly.tools/tools.json","llmsTxt":"https://toolsly.tools/llms.txt","sitemap":"https://toolsly.tools/sitemap.xml"},"relatedTools":[{"slug":"image-cropper","name":"Image Cropper","url":"https://toolsly.tools/image-cropper"},{"slug":"png-cropper","name":"PNG Cropper","url":"https://toolsly.tools/png-cropper"},{"slug":"image-to-grayscale","name":"Image to Grayscale","url":"https://toolsly.tools/image-to-grayscale"},{"slug":"image-to-bw","name":"Image to Black & White","url":"https://toolsly.tools/image-to-bw"},{"slug":"image-to-sepia","name":"Image to Sepia","url":"https://toolsly.tools/image-to-sepia"},{"slug":"image-invert-colors","name":"Invert Image Colors","url":"https://toolsly.tools/image-invert-colors"},{"slug":"image-blur","name":"Blur Image","url":"https://toolsly.tools/image-blur"},{"slug":"image-rotate","name":"Rotate Image","url":"https://toolsly.tools/image-rotate"}],"kind":"converter","slug":"image-contrast","name":"Image Contrast Adjuster","description":"Increase or decrease image contrast — drag the amount, runs in your browser.","longDescription":"Drop in an image and download a higher- or lower-contrast version. Uses the standard contrast formula: each channel is pulled toward or away from 50% gray by the factor you set. Positive amounts pop the highlights and shadows; negative amounts mute the image toward gray. Output format matches the input where possible, defaulting to PNG. Conversion runs locally in your browser — files never leave your device.","category":"image","categoryName":"Image","keywords":["image contrast","image contrast adjuster","adjust image contrast","increase image contrast","decrease image contrast","image contrast tool","online image contrast","free image contrast","change image contrast","photo contrast online","image contrast editor"],"url":"https://toolsly.tools/image-contrast","runsOn":"client","multiple":false,"batch":false,"input":{"type":"file","extensions":[".png",".jpg",".jpeg",".webp",".bmp"],"mimeTypes":["image/png","image/jpeg","image/webp","image/bmp"]},"output":{"type":"file","extension":".png","mimeType":"image/png"},"options":[{"type":"number","key":"amount","label":"Contrast amount","defaultValue":20,"min":-100,"max":100,"step":1,"help":"Negative reduces contrast (toward gray), positive boosts it. 0 means no change."}],"invocation":{"webUi":"https://toolsly.tools/image-contrast","api":null,"notes":"Currently runs client-side in the user's browser. Drop a file on the UI at `webUi` and download the converted result. A remote MCP/REST API is planned."}}