Skip to content

Studio Sync Live Rooms

Studio Sync Live Rooms Collections Open Source Privacy tools Feedback Features Changelog FAQ Privacy Terms Legal notice API docs Tips & tricks Roadmap Browser extension

Loading…

Tools

All tools
Collections
Open source tools
Privacy tools

Studios

PDF Studio
Image Studio
Paint Studio
Video Studio
HTML Studio
And many more

Resources

Features
Tips & tricks
Glossary
Changelog
FAQ
API docs
Roadmap
Browser extension
Sync devices
Live Rooms
Upload file

Legal

Privacy
Terms
Legal notice
GDPR
Cookie notice
FAQ
Contact
Feedback
Privacy matrix
Our mission
Brand assets
Software licenses

Popular guides

Merge PDF
Compress PDF
Split PDF
JSON formatter
UUID generator
Password generator
QR code
Regex tester
Compress image
E-Rechnung hub
XRechnung validator
Sign PDF
JWT decoder
Base64 encoder
Hash generator
PDF OCR
HEIC to JPG
Resize image
Cancellation letter
Invoice template

PDF tools

Merge PDF
Compress PDF
Split PDF
Sign PDF
PDF OCR

Image

Compress image
Resize image
HEIC to JPG
QR code
Video Studio

OCR & convert

PDF OCR
HEIC to JPG
Resize image
HTML minifier

Stay in the loop

Get updates on new tools, features, and improvements.

Your email address

No spam. Promise.

© 2026 Tentaco – Made with 💜 in the browser.

Local-first
•
Cloud optional
•
Works offline
•
Open source

Privacy Terms Legal notice GDPR Cookie notice FAQ Contact Open source tools Software licenses

Home
Tips & tricks

Guides

Tips & tricks

Step-by-step guides for PDF, JSON, e-invoicing and more — free in your browser.

35 guides
Step-by-step
In your browser

35 guides

Popular guides

How to merge PDF files — free guide
Step-by-step guide to combine PDFs in your browser without upload.
4 steps · PDF Studio
How to compress PDF — reduce file size
Compress PDF files locally to fit email limits — browser guide.
4 steps · PDF Studio
How to format JSON online
Pretty-print and validate JSON locally in your browser.
4 steps · Code Studio
How to create XRechnung — DE guide
Create and validate XRechnung invoices for German public buyers.
4 steps · Document Studio
E-invoice full workflow — EN 16931 to XRechnung submit
Create, validate and export German e-invoices with XRechnung and ZUGFeRD checks.
5 steps · Document Studio
How to optimize images for the web
Resize, compress and convert images for fast pages — HEIC, PNG, JPEG and OG cards.
5 steps · Image Studio

By studio

Workflows and how-tos grouped by the Tentaco studio they use.

Audio Studio
2 guides
Open studio
- How to detect BPM from audio
  Estimate song tempo locally from MP3 or WAV.
  4 steps · Audio Studio
- Music BPM workflow — detect tempo and key
  Estimate BPM and musical key from audio clips for DJ prep and video sync.
  5 steps · Audio Studio
Automation Studio
2 guides
Open studio
- How to build a cron schedule — readable expressions
  Create and validate cron expressions for Linux, GitHub Actions and Kubernetes CronJobs.
  5 steps · Automation Studio
- How to generate a .gitignore for your stack
  Create project-specific .gitignore files for Node, Python, Rust and monorepos — avoid committing secrets and build artifacts.
  5 steps · Automation Studio
Data Studio
2 guides
Open studio
- Database export pipeline — JSON flatten and CSV prep
  Flatten nested API JSON, convert CSV and validate before warehouse import.
  5 steps · Data Studio
- How to flatten nested JSON for databases
  Flatten nested JSON objects into dot-notation keys for SQL imports, CSV exports and analytics.
  5 steps · Data Studio
PDF Studio
2 guides
Open studio
- Complete PDF workflow — scan to signed export
  End-to-end guide: scan images, OCR, merge, compress, watermark and sign PDFs locally in Tentaco.
  5 steps · PDF Studio
- Job application PDF — tips (DE)
  Merge, compress and sign application PDFs locally before sending.
  4 steps · PDF Studio
Security Studio
2 guides
Open studio
- JWT decode workflow — inspect tokens safely
  Step-by-step guide to decode and validate JWT header and payload locally without sending tokens to a server.
  5 steps · Security Studio
- Password security audit — generate, test and hash
  Audit password policy with generators, strength checks and bcrypt dev hashes.
  5 steps · Security Studio
signature-studio
2 guides
Open studio
- How to add a PDF watermark
  Overlay DRAFT or CONFIDENTIAL text on every PDF page.
  4 steps
- How to sign a PDF — free guide
  Add a visual signature to PDF documents in your browser.
  4 steps
social-media-studio
2 guides
Open studio
- How to build UTM links for social campaigns
  Create consistent UTM-tagged URLs for analytics — source, medium, campaign naming best practices.
  5 steps
- Social media kit workflow — sizes, UTM and OG images
  Prepare campaign assets: resize images, build UTM links and OG preview cards.
  5 steps
Web & SEO Studio
2 guides
Open studio
- How to generate hreflang alternate tags
  Build reciprocal hreflang and x-default link tags from locale + URL lists before publishing multilingual pages.
  5 steps · Web & SEO Studio
- How to validate JSON-LD schema markup
  Validate schema.org JSON-LD before publishing — catch type errors and missing required fields.
  5 steps · Web & SEO Studio
3D & CAD Light
1 guide
Open studio
- 3D mesh inspect workflow — STL/OBJ before printing
  Preview meshes, check triangle counts and bounding box before slicer upload.
  5 steps · 3D & CAD Light
API Studio
1 guide
Open studio
- Developer API testing workflow — curl, CORS and OpenAPI
  Validate APIs locally: convert curl, test CORS, lint OpenAPI and mock JSON responses.
  5 steps · API Studio
Document Studio
1 guide
Open studio
- German Impressum setup — legal notice workflow
  Create Impressum text, privacy policy and cancellation templates for German websites.
  5 steps · Document Studio
education-studio
1 guide
Open studio
- Education math tools workflow — calculators and quizzes
  Use Tentaco calculators and quiz generators for classroom prep and demos.
  5 steps
email-studio
1 guide
Open studio
- How to parse email headers — trace routing and SPF
  Inspect raw email headers to debug delivery, authentication and routing hops.
  5 steps
legal-compliance-studio
1 guide
Open studio
- How to create an Impressum (Germany)
  Generate German legal notice text for your website.
  4 steps
Map & Geo Studio
1 guide
Open studio
- How to validate GeoJSON — feature and geometry checks
  Validate GeoJSON structure, count features and inspect bounding boxes locally.
  5 steps · Map & Geo Studio
ocr-scan-studio
1 guide
Open studio
- How to OCR a scanned PDF
  Extract searchable text from scanned documents locally.
  4 steps
productivity-studio
1 guide
Open studio
- How to use a Pomodoro timer
  Run 25/5 focus cycles in Productivity Studio.
  4 steps
regex-parser-studio
1 guide
Open studio
- Regex testing guide — patterns before production
  Build, test and document regex patterns with local highlighter and replace preview.
  5 steps
schema-studio
1 guide
Open studio
- Schema validation guide — JSON Schema and OpenAPI
  Validate JSON payloads against schemas and lint OpenAPI specs before release.
  5 steps
subtitle-studio
1 guide
Open studio
- Subtitle burn-in workflow — SRT validate to video
  Validate SRT files, adjust timing and prepare burn-in or soft subs for export.
  5 steps
Video Studio
1 guide
Open studio
- Video compress for social — size limits and formats
  Compress and trim video for Instagram, LinkedIn and email attachment limits.
  5 steps · Video Studio