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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.
- Launch tool
Diff Checker
Compare copy, configs, or payloads with line-level highlights and change counts.
- Launch tool
Batch Image Compression
Drop entire screenshot sets, batch compress to WebP/AVIF, and preview per-file savings.
- Launch tool
JSON Toolkit
Beautify, minify, and validate JSON or decode payloads before committing changes.
- Launch tool
Time Studio
Hop between epoch, ISO, and readable strings while calculating diffs in milliseconds.
Privacy & performance built in
Every tool runs client-side with instant feedback.
- Privacy-first
- All processing stays local
- High performance
- Edge-accelerated delivery
- Always free
- 100% free to use with no limits
- Responsive design
- Great on desktop and mobile
- Instant start
- No sign-up, just run
- Multi-language & themes
- English/Chinese with light/dark modes
Get started in three steps
No registration, no download required - just open and use
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Input data
Enter or paste content to process in the form, with quick-fill sample data support
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Get results
Click the run button and copy results to clipboard with one click for immediate use in your project
What TOOLCLI helps you accomplish
Centralise everyday developer chores instead of bouncing between bookmarks.
Compress and ship images
Drag in screenshots to batch-compress to WebP/AVIF with clear savings before download.
- Import multiple images and set format/quality once
- Preview before/after file size and dimensions instantly
- Download optimised assets together for PRs or handoffs
Tidy up text and docs
Clean strings, generate naming variants, and compare changes before sharing with teammates.
- Produce every casing style and URL slug at once
- Trim whitespace, dedupe lines, or strip Markdown quickly
- Diff request/response bodies to highlight what changed
Prep data and API payloads
Inspect or reshape responses, produce TypeScript interfaces, and copy clean payloads to other tools.
- Validate and prettify JSON before committing
- Convert Base64 or URL-encoded content back to plain text
- Turn sample JSON into TypeScript definitions instantly
Handle time, IDs, and signatures
Swap epoch, ISO, and readable time formats while generating hashes or IDs needed for automation.
- Translate timestamps to ISO, RFC 3339, or natural strings
- Create UUIDv4/v7, ULID, Nano ID, and secure tokens
- Generate SHA-1/256/512 or HMAC-SHA256 hashes for payload checks
Comprehensive coverage for development scenarios
Six major tool categories covering 20+ daily development tasks
Text Suite
Case conversion, formatting, encoding/decoding, text analysis and statistics. Supports batch operations and real-time preview.
Data & APIs
JSON/YAML/TOML/XML format conversion, JWT parsing, data validation and formatting for handling various API data formats.
Design & Visuals
Color picker, format conversion, QR code generation to meet visual and interactive needs in frontend development.
Date & Time
Timestamp conversion, multi-format time parsing, timezone conversion, MongoDB ObjectID time extraction and more.
Security & Hashing
MD5, SHA series, HMAC and other hashing algorithms for data integrity verification and cryptographic applications.
Generators
UUID, ULID, Nano ID, random passwords, tokens and various ID and random data generation tools.
Real-world playbooks that mix multiple tools
Follow concrete workflows to ship production tasks faster and shareable with your team.
Ship API contract updates confidently
Clean payloads, capture the diff, and hand off strict types so downstream consumers don’t guess.
Beautify the latest response and validate the JSON before announcing changes.
Compare staging and production payloads to pinpoint field-level differences.
Generate up-to-date TypeScript interfaces and paste them into your SDK or docs.
Launch product copy across multiple touchpoints
Create consistent naming, polish the copy, and diff revisions before syncing with design and docs.
Generate slug, camelCase, CONSTANT_CASE, and title variations from a single phrase.
Strip Markdown leftovers, trim whitespace, and deduplicate lines for final copy.
Highlight wording changes between revisions before sharing with reviewers.
Debug production incidents with precise timestamps
Convert raw logs, reconcile timezones, and share a clean incident timeline with the team.
Convert epoch values to ISO 8601 strings and human readable descriptions.
Translate hex or base-n identifiers into decimal to match database records.
Produce SHA or HMAC hashes to verify payload integrity when replaying events.