Free Online Tools
A curated collection of secure, fast, privacy-friendly utilities — built for developers and everyday use.
QR Generator
Create branded QR codes for URL, Wi-Fi, vCard, phone or JSON. Customize colors & logo, export PNG/SVG for web or print.
Secret Share
Send self-destructing one-time links with optional password, view limits and expiry. Encrypted and removed after use/expiry.
Webhook Logger
Capture incoming webhooks, inspect headers and payloads, and replay requests anytime. Built for debugging real integrations.
Educational Games
Learn by doing with quick browser games for HTTP status codes and SEO snippet writing.
Uptime Monitor
Keep an eye on your websites and APIs. Get notified when they go down. Includes history and response time tracking.
PDF Tools
Edit, merge, split, compress, and convert PDFs in a single workspace. Built for practical day-to-day document operations without sign-up.
Common Workflows
- Merge contracts -> remove extra pages -> compress for email.
- Split one long PDF into page files and export only what you need.
PDF Studio
All-in-one PDF workspace: merge, split, compress, reorder, rotate, and page cleanup.
Compress PDF
Reduce PDF size while keeping great visual quality.
PDF Merge
Upload multiple PDFs and combine them into one file.
PDF Split
Split a PDF into separate pages and download as ZIP.
PDF → Image
Convert PDF pages into high-quality PNG or JPG images.
Image → PDF
Combine JPG/PNG/WebP images into a single PDF file.
Image Tools
Convert and optimize images for web, print, and document workflows. Process batches with clear controls over output format and quality.
Common Workflows
- Convert HEIC photos to JPEG/PNG for compatibility.
- Optimize screenshots, then combine them into one PDF handout.
Image Studio
Batch image editor with per-image settings: format, quality, resize, rotate, grayscale.
Image Optimizer
Resize, compress and convert images to WebP, PNG or JPEG.
Image Converter
Convert HEIC/HEIF, JPG, PNG, WebP, GIF, BMP and TIFF to JPEG, PNG or WebP.
PDF → Image
Convert PDF pages into high-quality PNG or JPG images.
Image → PDF
Combine JPG/PNG/WebP images into a single PDF file.
Developer Tools
A practical toolbox for everyday engineering tasks: payload debugging, encoding, hashing, timestamp conversion, and protocol utilities.
Common Workflows
- Decode JWT -> inspect claims -> verify signature format.
- Format JSON -> sign payload -> test webhook verification.
Base64 Encode/Decode
Convert text to/from Base64 instantly — runs locally in your browser.
Hash Generator
Create SHA-256, SHA-1 and MD5 hashes client-side for quick integrity checks.
UUID Generator
Generate RFC4122 UUID v4 identifiers and copy with one click.
URL Encoder/Decoder
Encode query params safely or decode percent-encoded strings.
JSON Formatter
Pretty-print, minify and validate JSON locally in your browser.
Timestamp Converter
Convert Unix time ↔ human-readable date with timezone/ISO output.
JWT Decoder
Decode JWT tokens and view header & payload JSON — runs locally.
Regex Tester
Test regular expressions and instantly highlight matches in your text.
SEO Audit
Audit core on-page SEO signals with low-load crawl limits and clear recommendations.
Word Frequency Analyzer
Analyze webpage keyword frequency and density with optional English stop-word filtering.
HTTP Header Inspector
Inspect status, redirects, headers, and security/caching signals for a URL.
Webhook Signature Generator/Verifier
Generate and verify HMAC webhook signatures from payload + secret.
Cron Expression Humanizer
Convert cron schedules into readable language and validate expression syntax.
Robots.txt + Sitemap Validator
Validate robots.txt and sitemap XML setup, including nested sitemap indexes.
Redirect Chain Visualizer
Trace every redirect hop with status, timing and resolved Location target.
Website Link Checker
Crawl pages with strict limits and detect broken internal or external links.
CSV ↔ JSON Converter
Convert CSV to JSON or JSON to CSV with delimiter options.
Monitoring & API Tools
Track uptime and redirect behavior, and stress-test API limits. These tools focus on production reliability and fast incident debugging.
Common Workflows
- Validate endpoint health -> inspect redirect chain -> test rate limits.
- Use dashboard history to compare response behavior across deployments.
️ Text & Content Tools
Generate placeholder content, compare revisions, and measure text size quickly. Useful for writing, QA, product docs, and content workflows.
Common Workflows
- Generate dummy content -> review copy diff -> verify final length.
- Compare two policy versions before publishing updates.
Security Tools
Generate strong credentials and share sensitive notes via one-time links. Focused on practical security hygiene for teams and individuals.
Common Workflows
- Create unique password -> deliver via one-time secret link.
- Share short credentials safely with auto-expiry.
How To Pick The Right Tool Fast
If you are unsure where to start, choose by outcome. Need to edit documents end-to-end? Open PDF Studio. Need per-image control on a batch? Use Image Studio. Debugging APIs? Start with Webhook Logger and Header Inspector, then validate limits with Rate Limit Tester.
Content Workflow
Text Diff + Word Counter + Dummy generator for writing, editing, and release notes.
File Workflow
Image Optimizer/Image Converter + PDF Studio for share-ready files with smaller size.
Ops Workflow
Uptime + Redirect Monitor + Webhook Logger for production checks and incident triage.
Privacy & Security — built in
Most tools (Base64, Password, Hash, UUID, URL, JSON, Timestamp, Regex, JWT Decoder, Diff, Word Counter, Lorem Ipsum/Dummy JSON) run fully client-side in your browser. Your input never leaves your device.
Secret Share and file tools (Image Optimizer, Image → PDF, Compress PDF, PDF Merge/Split, CSV ↔ JSON) process files on the server but keep them only temporarily in /tmp.
Nothing is stored permanently. All uploads are deleted after processing.
No ads. Just fast, secure tools designed for developers and everyday use.