Privacy-first
Local-first, with network tools clearly marked
Know your tools instantly
Convert, inspect, and ship faster with toolcli
Text, data, time, colour, security, and generator utilities live in a single workspace so you always know where to go for quick fixes.
High performance
Edge-accelerated delivery
Multi-language & themes
English/Chinese with light/dark modes
Workflow Picks
Featured workflows
01Open workflow →02Open workflow →03Open workflow →
401 / 403 and webhook troubleshooting
API Auth Debugger
Check JSON bodies, diagnose JWT timing issues, and verify HMAC-SHA256 signatures.
Multi-line content processing
List Cleanup & Export
Clean multi-line content, normalize lists, and export reusable formats.
Web image publishing workflow
Responsive Image Publisher
Turn source images into responsive AVIF and WebP assets, ready-to-use picture markup, and one downloadable package.
Tool Picks
Featured tools
JSON Toolkit
Format, compact, or validate JSON payloads.
Batch Image Lab
Compress multiple images in one go with unified settings, previews, and bulk downloads.
Time Studio
Convert timestamps and dates between multiple formats with ease.
Hash Workbench
Generate SHA digests or HMAC signatures for payloads.
Color Lab
Convert between HEX/RGB or generate vibrant palettes instantly.
Identifier Forge
Mint UUIDs, Nano IDs, secure tokens, passwords, or filler text.
Practical guides
From the blog
Online JSON Validator and Formatter Workflow with a Privacy-First Toolcli Workspace
When you’re debugging APIs or reviewing config files, you need a safe way to validate, format, and diff JSON directly in the browser. This overview shows how a privacy-first toolcli workspace streamlines standards-compliant checking, beautifying, editing, and comparison.
Formatter Online Json: a Workflow Guide to Beautifying, Validating, and Debugging JSON in the Browser
When every browser debugging session drowns you in minified JSON payloads and noisy logs, a focused online formatter becomes essential. This guide shows how to use toolcli’s privacy‑friendly JSON viewer, validator, and quick CSV/XML conversion to keep your data readable and trustworthy.
Online Base64 Encoder Decoder in the Browser for Developers
When you’re debugging APIs, JWTs, or log output, a privacy‑first, browser‑only Base64 encoder/decoder can replace throwaway scripts and unsafe web tools. This guide shows how to use toolcli.com to encode/decode text, JSON, files, and images locally, handle Base64 vs Base64URL correctly, and avoid common mistakes.