How-To Guides26 guides
Step-by-step guides for common file processing tasks. Each guide uses browser-only tools to achieve your goal safely.
- Organize PDFs for Tax Filing
Merge, clean up, and compress tax filing PDFs for free. Files are processed entirely in your browser and never uploaded. Perfect for e-Tax attachments.
✓ 3.2 MB → 0.8 MB - Check Images Before Posting to SNS
Check EXIF, GPS location, and QR code risks before posting to SNS. Remove metadata and compress — all in your browser, no uploads.
✓ GPS data detected & removed - Extract Thumbnails and Audio from Video
Trim video, extract a thumbnail frame, and save audio as MP3 — all without any video editing software, directly in your browser.
✓ 1.8 GB → 48 MB - Redact PDFs Before Submitting or Sharing
Redact names, addresses, and account numbers in PDFs before submitting or sharing. All processing stays in your browser — safe for confidential documents.
✓ 12 fields redacted - Stamp a PDF with a Custom Seal
Create a seal stamp image and paste it into a PDF with Ctrl+V — all in your browser. Files never leave your device.
✓ Done in under 5 minutes - Organize Job-Hunting Documents as PDF
Convert resumes, CVs, and ID photos to PDF, merge documents, and remove photo backgrounds — free, all in your browser. Perfect for job-hunting document prep.
✓ 5 files → 1 PDF - Redact Real Estate Contracts Before Submission
Redact account numbers, seal impressions, and personal data in real estate contracts before submission. All processing in your browser — no cloud upload.
✓ 8 fields redacted - Create a Restaurant Menu PDF from Images
Create a restaurant menu PDF from food photos and menu images for free. Resize, convert, and organize pages — all in your browser, no app required.
✓ 6 images → 1 PDF - Digitally Save Business Card Photos and Remove EXIF
Photograph business cards, crop, remove EXIF data, and convert to PDF. Digitize contact information safely without uploading to any server.
✓ EXIF & GPS removed - Digitize Receipts by Camera and Convert to PDF
Photograph receipts, crop, convert to PDF, and merge multiple pages — free, in your browser. Perfect for expense reports and tax filing attachments.
✓ Digitized in 3 minutes - Redact Confidential Data from Internal Reports Before Distribution
Redact names, figures, and sensitive content from internal reports and meeting minutes before distribution. All processing in your browser — no cloud upload for confidential docs.
✓ 20 items redacted - Compress Scanned Document PDFs for Easy Sharing
Compress large scanned PDFs from scanners or multifunction printers for free. Meet email attachment limits and e-submission size caps — all in your browser.
✓ 8.4 MB → 1.2 MB - Remove Background from Profile or ID Photos with AI
AI automatically removes backgrounds from portrait and ID photos. Create transparent cutouts for ID photos or SNS profiles — free, in your browser, no cloud.
✓ Background removed in 30 seconds - Convert iPhone HEIC Photos to JPEG for Easy Sharing
Convert iPhone HEIC photos to JPEG so they open on Windows, Android, and anywhere else. Browser-only processing — no upload needed.
✓ 12 photos converted in one batch - Unlock a Password-Protected PDF for Editing or Sharing
Enter the password to remove restrictions from a locked PDF. Unlock printing, editing, and text copying, then continue with annotations or compression — all in your browser.
✓ Password removed - Extract Audio from Meeting Recordings for Transcription
Trim the relevant portion of a Zoom or Teams recording and extract the audio as MP3. Ideal for preparing input files for external transcription services — browser only.
✓ 1.2 GB → 45 MB - Create a Square Profile Icon for SNS
Crop, resize, and compress a portrait photo into a square profile icon for X, Instagram, LINE, Slack, and more — all in your browser.
✓ Reshaped to square icon - Split a Large PDF by Chapter or Section for Distribution
Split large manuals, reports, or handouts by page range and compress each part for easy distribution. Browser-only — no upload needed.
✓ 82 pages → 5 sections - Format, Validate, and Diff JSON API Responses
Prettify minified JSON for readability, validate syntax errors, and visually diff two JSON responses — all in your browser, no setup needed.
✓ 2 differences detected instantly - Convert PDF Pages to Images for Web or Slide Use
Convert each page of a PDF to PNG or JPEG. Use the images in presentations, websites, blogs, or SNS posts — all in your browser, no upload.
✓ 24 pages → 24 PNG images - Share URLs and Contacts as QR Codes
Turn URLs, text, or contact info into QR code images for sharing and printing. Save as an image and resize for print. All in-browser, no sign-up.
- Convert Unix Timestamps to Local Time
Convert Unix timestamps from logs and APIs into readable dates in JST, UTC, or US time. Runs in your browser — your data is never uploaded.
- Count Characters and Lines Against Limits
Count characters and lines in application forms or SNS posts to check they fit the limit. Includes full-width/half-width normalization. In-browser, no sign-up.
- Bulk Replace with Regex and Tidy Up Text
Bulk-replace text with regex, then deduplicate and sort lines to finish the cleanup. Great for log tidying and data prep. In-browser, no uploads.
- Convert Photos to WebP for Lighter Web Pages
Convert JPEG or PNG photos to WebP, then resize and compress to lighten web pages and email attachments. In-browser — images are never uploaded.
- Extract Only the Pages You Need from a PDF
Pull out just the pages you need from a large PDF, then compress for easier sharing. In-browser, files are never uploaded. No sign-up.
✓ 120 pages → 8 pages