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.
Cobalt Tools
Four collections. Tools that do the work.
Image tools
HEIC, WebP, compression and resizing. Files stay on your device.
PDF tools
Compress, merge, split and convert PDFs with local processing.
AI & authenticity
Inspect Content Credentials, AI provenance and transparency guidance.
Website / AI SEO
Check crawler policies, technical readiness and agent discovery.
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.
AI Provenance Checker
Inspect embedded AI origin claims, creator software, editing history and EXIF locally. No guessed AI probability.
Open free checkerContent Credentials Checker
Read embedded C2PA manifests, examine validation details and understand the limits of signer trust, all on your device.
Open free checkerAI Transparency Guide
Work through a short educational checklist about AI-generated content, deepfakes and Article 50 disclosure obligations.
Open free checkerAI Visibility Checker
Audit a public URL for crawler policy, indexability, initial HTML and structured data. Technical readiness, with evidence for every finding.
Open free checkerAI Crawler Checker
Check search, training and user-request policies separately for OpenAI, Claude, Perplexity and Google. Generate a reviewed robots.txt draft.
Open free checkerAgent Readiness Checker
Inspect discovery, readable content, structured data and optional agent interfaces. See which capabilities are present without pretending to measure AI rankings.
Open free checkerCase Lemn 3D
Configurează online o casă timber frame pe structură de lemn în Brașov: randare 3D interactivă, plan 2D, deviz materiale, izolație nZEB și ofertă de preț instant.
Deschide configuratorul 3DCalculatoare Online
11 calculatoare online: procente și reduceri, energie, buget, economii, zile între date, unități, salariu, credit, materiale, carburant și TVA.
Deschide calculatoarele onlineEtsy Image Prep
Prepare product photos and shop banners for Etsy with ready-to-use sizes, image framing, JPG backgrounds and batch ZIP downloads in your browser.
Prepare product photosPrintReady
Prepare images at exact print sizes in cm, mm or inches, set DPI and framing, then export JPG, PNG or a correctly sized PDF.
Prepare a printAVIF to JPG / PNG
Convert multiple AVIF images to JPG or PNG in your browser. Resize, choose a JPG background and download files individually or as a ZIP.
Convert AVIF imagesListingReady for Etsy
Prepare an Etsy listing title and tags with live character counts, duplicate checks and copy actions, directly in your browser.
Check a listingPopular 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