{"$schema":"https://toolsly.tools/schemas/tool-manifest-v1.json","generated":"2026-05-20T20:47:38.012Z","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-sharpen","name":"Image Sharpener","description":"Sharpen a blurry image — 3×3 convolution kernel, runs in your browser.","longDescription":"Drop in a slightly soft image and download a sharper version. Applies a classic 3×3 sharpening convolution kernel ([0,-1,0; -1,5,-1; 0,-1,0]) blended with the original by the strength you choose. Strength 0 leaves the image unchanged; 1 applies the full sharpening filter. Output is always PNG so transparency is preserved. Conversion runs locally in your browser — files never leave your device.","category":"image","categoryName":"Image","keywords":["image sharpen","sharpen image online","image sharpener","sharpen blurry image","image sharpening tool","online image sharpener","free image sharpener","photo sharpener online","sharpen photo","image clarity tool","sharpen picture"],"url":"https://toolsly.tools/image-sharpen","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":"strength","label":"Strength","defaultValue":1,"min":0,"max":1,"step":0.05,"help":"0 = no change. 1 = full kernel applied. Try 0.5 for a gentle effect."}],"invocation":{"webUi":"https://toolsly.tools/image-sharpen","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."}}