Cobalt Tools
Free browser tools for images, PDFs, 3D files and developers.
Resize images, clean metadata, merge PDFs, view GLB, STL and OBJ models, convert GLB to USDZ for Apple AR, format JSON and use text utilities, generate favicons, convert images to Base64 and create static QR codes. Pick a free tool, process locally and download or copy the result.
Available tools
Cobalt Tools starts with practical image, PDF, developer and 3D utilities. Every public tool here has a real working page and a browser-first workflow.
UploadReady
Make images ready for exact upload limits with browser-based resize, compression, crop and conversion presets.
Open UploadReadyMetadata Cleaner
Strip embedded EXIF, GPS, XMP, C2PA and AI generator metadata from images by re-encoding them locally in your browser.
Clean image metadata3D Model Viewer
View GLB, STL and OBJ models online for free with orbit controls, scene hierarchy, wireframe mode and material inspection.
Open 3D viewerGLB to USDZ
Convert GLB 3D models to USDZ online for free so they can be tested with iPhone, iPad and Apple AR Quick Look.
Convert GLB to USDZPDF Tools
Merge, split, organize, convert, resize, extract text, count pages, clean metadata, rotate and watermark PDFs with free browser-first tools.
Open PDF toolsDeveloper Tools
Format JSON, encode Base64, decode URLs, generate UUIDs, convert timestamps and count text with free browser utilities.
Open developer toolsCompress Image
Compress images online for free with local browser processing.
Open free toolResize Image
Resize images by pixel width and height online for free.
Open free toolCrop Image
Crop images online for free with browser processing.
Open free toolImage to WEBP
Convert images to WEBP online for free.
Open free toolMerge PDF
Combine PDFs in the order you upload them.
Open free toolSplit PDF
Create a new PDF from a selected page range.
Open free toolPopular upload presets
Choose the exact size, format or dimension requirement you need. Every preset opens the same useful image editor with settings already loaded.
Image to 100KB
Compress and resize an image until it fits under a 100KB upload limit.
Open presetImage to 200KB
Create an upload-ready image under 200KB without installing software.
Open presetImage to 500KB
Reduce image file size to fit under a 500KB upload requirement.
Open presetJPG to 100KB
Shrink a JPG photo to fit a 100KB upload limit while keeping it usable.
Open presetJPG to 200KB
Compress a JPG image to a practical 200KB limit for online forms.
Open presetPNG to 100KB
Convert and compress a PNG image to a small JPG that fits under 100KB.
Open preset600x600 Image
Crop and resize an image to an exact 600 by 600 pixel square.
Open preset1024x1024 Image
Create an exact 1024 by 1024 square image for profiles, catalogs or forms.
Open preset