Local-first developer tools that keep sensitive data in your browser
Format JSON, decode JWTs, encode Base64, generate hashes, resize images, merge PDFs, and debug public URLs. Most tools run entirely in your browser, so tokens, payloads, files, and text are not uploaded.
Search-first workflow
Jump straight to the tool you need.
30
tools
27
local
30
working
Popular tools
Fast local utilities for the workflows people reach for every day.
Popular privacy-safe workflows
Start with the task, then jump into the tool with the right privacy expectations.
Choose local-first tools for sensitive data
Pick browser-local workflows for tokens, logs, PDFs, images, and JSON.
Decide if a JSON formatter is safe
Use a practical checklist before pasting API responses or logs.
Debug JWT tokens locally
Decode claims, check timestamps, and avoid upload-based token tools.
Use technical SEO debugging tools
Check redirects, headers, metadata, robots.txt, and URL structure.
Remove image metadata before uploading
Strip EXIF and editor metadata locally before sharing images.
Merge PDF files locally
Combine documents in the browser without an upload step.
Categories
Browse by job: development, text cleanup, SEO, images, PDFs, and network checks.
Developer tools
Format, parse, encode, decode, and generate common dev assets.
13 tools
Text tools
Clean up text, compare changes, and convert naming formats.
5 tools
Web/SEO tools
Build metadata, UTM links, previews, and crawl directives.
4 tools
Image tools
Local-first image cleanup and resizing workflows.
2 tools
PDF tools
Merge, split, and optimize PDF files locally in the browser.
3 tools
Network tools
Check public HTTP details that need a small server request.
3 tools
Sponsored
Cut your cloud costs by 70%
Production-ready Kubernetes clusters on your own Hetzner account. Full access. Full control.
Provision Time
<2min
Cost Savings
70%
Architecture
Managed K8s Control Plane
Your files, secrets, tokens, and text stay on your machine.
Browser-local
Most tools run entirely in the client with no upload step.
No accounts
The MVP has no login, payments, or database; sponsor spots stay labeled.
Clear labels
Any future server/API feature is marked before you use it.