800+ free tools that run entirely in your browser. No sign-up, no uploads, no cookies. https://buffermint.com/tools/ 2026-10-20T14:54:02+05:30 BufferMint (OPC) Pvt. Ltd. https://buffermint.com/tools/dev/dummy-file-generator/ 2026-10-20T14:54:02+05:30

Generate dummy test files of any exact size in your browser: zeros or random bytes, or valid PDF, PNG, JPEG, ZIP, CSV and JSON files. Ideal for upload testing.

https://buffermint.com/tools/dev/fake-data-generator/ 2026-10-20T14:54:02+05:30

Generate realistic fake test data in your browser: names, emails, addresses, orders and products as JSON, CSV, SQL INSERT or NDJSON. Seeded and shareable.

https://buffermint.com/tools/pdf/markdown-to-pdf/ 2026-10-20T14:54:02+05:30

Convert Markdown to PDF in your browser: headings, lists, tables, code blocks and quotes with live preview, paper size and margins. Open a .md file. No upload.

https://buffermint.com/tools/pdf/word-to-pdf/ 2026-10-20T14:54:02+05:30

Convert Word to PDF free and privately: drop a .docx file, preview headings, tables and images, pick paper size and margins, then save as PDF. No upload.

https://buffermint.com/tools/pdf/protect-pdf/ 2026-10-20T14:54:02+05:30

Password-protect a PDF with AES-256 encryption in your browser. Optionally block printing, copying or editing. Your file and password never leave your device.

https://buffermint.com/tools/pdf/unlock-pdf/ 2026-10-20T14:54:02+05:30

Unlock a PDF in your browser: enter the password you know to save an unprotected copy, or remove printing and copying restrictions. Nothing is uploaded.

https://buffermint.com/tools/pdf/redact-pdf/ 2026-10-20T14:54:02+05:30

Redact a PDF for real in your browser: draw boxes or find names, emails, phone and account numbers. Redacted pages are flattened, so hidden text is truly gone.

https://buffermint.com/tools/pdf/scan-to-pdf/ 2026-10-20T14:54:02+05:30

Scan documents to PDF from phone photos: automatic edge detection, perspective straightening, shadow removal and multi-page PDF. No app, no upload.

https://buffermint.com/tools/pdf/pdf-to-word/ 2026-10-20T14:54:02+05:30

Convert PDF to Word free in your browser: editable .docx with paragraphs and headings rebuilt, or an exact-look version with page images. No upload, no limits.

https://buffermint.com/tools/files/video-speed-changer/ 2026-10-20T14:54:02+05:30

Change video speed online: speed up to 2x, 4x or 16x or make slow motion at 0.5x or 0.25x, keep voice pitch natural, save MP4 or WebM. No upload, no watermark.

https://buffermint.com/tools/files/video-crop-vertical/ 2026-10-20T14:54:02+05:30

Convert horizontal video to vertical 9:16 for TikTok, Reels and Shorts: crop and reposition, or keep the full frame with a blurred background. No upload.

https://buffermint.com/tools/files/merge-videos/ 2026-10-20T14:54:02+05:30

Merge videos online for free: join MP4, WebM or MOV clips in any order into one video, with sound, in 16:9, 9:16 or square. No upload and no watermark.

https://buffermint.com/tools/files/burn-subtitles-into-video/ 2026-10-20T14:54:02+05:30

Burn subtitles into a video for free: add SRT or VTT captions as open captions in black-box, outline or bold Reels styles, then save MP4 or WebM. No upload.

https://buffermint.com/tools/seo/privacy-policy-generator/ 2026-10-20T14:54:02+05:30

Free privacy policy generator for websites, apps and online shops: GDPR and CCPA sections, cookies, Google Analytics, Stripe and more. Copy as HTML or text.

https://buffermint.com/tools/seo/youtube-thumbnail-preview/ 2026-10-20T14:54:02+05:30

Preview your YouTube thumbnail and title in mock home, search, up next and mobile feeds, light or dark, beside competitors. Checks size and title length.

https://buffermint.com/tools/seo/social-post-preview/ 2026-10-20T14:54:02+05:30

Preview a social media post before publishing: mock-ups for X, LinkedIn, Instagram, Facebook and Threads with see-more cut-offs, limits and image crops.

https://buffermint.com/tools/seo/link-in-bio-generator/ 2026-10-20T14:54:02+05:30

Create a free link-in-bio page with photo, bio, links, socials and themes, then download one fast HTML file to host on your own domain. A Linktree alternative.

https://buffermint.com/tools/text/grammar-checker/ 2026-10-20T14:54:02+05:30

Free private grammar checker: fix spelling, grammar, punctuation and confused words like their/they're in US or UK English. Runs on your device, no upload.

https://buffermint.com/tools/design/image-to-svg/ 2026-10-20T14:54:02+05:30

Convert PNG or JPG to SVG free: trace logos, icons and drawings into sharp vector paths, choose colours and detail, remove the background. Runs in your browser.

https://buffermint.com/tools/photo/background-remover/ 2026-10-20T14:54:02+05:30

Remove image backgrounds free with AI that runs in your browser: full-resolution transparent PNG, white or blurred backgrounds, touch-up brush. No upload.

https://buffermint.com/tools/photo/image-upscaler/ 2026-10-20T14:54:02+05:30

Upscale images 2x or 4x free: instant sharp resizing for any image, or AI enhancement (Swin2SR) that restores detail in small photos. Private, no watermark.

https://buffermint.com/tools/media/subtitle-editor/ 2026-10-20T14:54:02+05:30

Edit SRT and VTT subtitles online: preview them on your video, fix timings, shift or two-point sync drifting subtitles, find overlaps and export SRT or WebVTT.

https://buffermint.com/tools/media/bpm-detector/ 2026-10-20T14:54:02+05:30

Detect the BPM of a song online: drop an MP3, WAV or M4A to get its tempo in seconds, check it with a metronome click, and switch half or double time. Private.

https://buffermint.com/tools/media/audio-visualizer-video/ 2026-10-20T14:54:02+05:30

Make an audiogram: turn podcast clips, voice notes or songs into a square, vertical or wide video with an animated waveform, cover art and title. No upload.

https://buffermint.com/tools/media/transcribe-audio/ 2026-10-20T14:54:02+05:30

Transcribe audio and video to text free with OpenAI's Whisper running on your device: 100 languages, timestamps, translate to English, export TXT, SRT or VTT.

https://buffermint.com/tools/media/auto-subtitle-generator/ 2026-10-20T14:54:02+05:30

Generate subtitles for a video automatically: speech recognition with Whisper on your device creates timed SRT or VTT captions in 100 languages. No upload.

https://buffermint.com/tools/math/confidence-interval-calculator/ 2026-10-20T14:30:56+05:30

Confidence interval calculator for a mean (t or z) or a proportion (Wilson or Wald), from summary stats or raw data. Shows the margin of error and every step.

https://buffermint.com/tools/education/gradebook/ 2026-10-20T14:30:56+05:30

Free online gradebook for teachers: class rosters, weighted categories or total points, instant percentages and letter grades, CSV import/export and reports.

https://buffermint.com/tools/education/test-grade-calculator/ 2026-10-20T14:30:56+05:30

Test grade calculator for teachers: enter the number of questions and number wrong to get the percentage and letter grade, plus a printable grading chart.

https://buffermint.com/tools/education/ucas-personal-statement-checker/ 2026-10-20T14:30:56+05:30

UCAS personal statement checker for the new three-question format: 4,000-character total, 350 minimum per answer, plus checks for clichés and long sentences.

https://buffermint.com/tools/business/gst-calculator-india/ 2026-10-20T14:30:56+05:30

Free India GST calculator: add or remove 18% GST in one click and see net, GST and gross amounts. Reduced rates listed, bulk price lists.

https://buffermint.com/tools/business/income-tax-calculator-india/ 2026-10-20T14:30:56+05:30

Income tax calculator India for FY 2026-27: new vs old regime side by side, ₹75,000 standard deduction, 87A rebate up to ₹12 lakh, surcharge and 4% cess.

https://buffermint.com/tools/business/gst-calculator-new-zealand/ 2026-10-20T14:30:56+05:30

Free New Zealand GST calculator: add or remove 15% GST in one click and see net, GST and gross amounts. Reduced rates listed, bulk price lists.

https://buffermint.com/tools/business/vat-calculator-saudi-arabia/ 2026-10-20T14:30:56+05:30

Free Saudi Arabia VAT calculator: add or remove 15% VAT in one click and see net, VAT and gross amounts. Reduced rates listed, bulk price lists.

https://buffermint.com/tools/business/vat-calculator-uae/ 2026-10-20T14:30:56+05:30

Free United Arab Emirates VAT calculator: add or remove 5% VAT in one click and see net, VAT and gross amounts. Reduced rates listed, bulk price lists.

https://buffermint.com/tools/business/vat-calculator-south-africa/ 2026-10-20T14:30:56+05:30

Free South Africa VAT calculator: add or remove 15% VAT in one click and see net, VAT and gross amounts. Reduced rates listed, bulk price lists.

https://buffermint.com/tools/business/vat-calculator-sweden/ 2026-10-20T14:30:56+05:30

Free Sweden VAT calculator: add or remove 25% VAT in one click and see net, VAT and gross amounts. Reduced rates listed, bulk price lists.

https://buffermint.com/tools/business/vat-calculator-poland/ 2026-10-20T14:30:56+05:30

Free Poland VAT calculator: add or remove 23% VAT in one click and see net, VAT and gross amounts. Reduced rates listed, bulk price lists.

https://buffermint.com/tools/business/vat-calculator-belgium/ 2026-10-20T14:30:56+05:30

Free Belgium VAT calculator: add or remove 21% VAT in one click and see net, VAT and gross amounts. Reduced rates listed, bulk price lists.

https://buffermint.com/tools/business/vat-calculator-netherlands/ 2026-10-20T14:30:56+05:30

Free Netherlands VAT calculator: add or remove 21% VAT in one click and see net, VAT and gross amounts. Reduced rates listed, bulk price lists.

https://buffermint.com/tools/business/vat-calculator-italy/ 2026-10-20T14:30:56+05:30

Free Italy VAT calculator: add or remove 22% VAT in one click and see net, VAT and gross amounts. Reduced rates listed, bulk price lists.

https://buffermint.com/tools/business/vat-calculator-spain/ 2026-10-20T14:30:56+05:30

Free Spain VAT calculator: add or remove 21% VAT in one click and see net, VAT and gross amounts. Reduced rates listed, bulk price lists.

https://buffermint.com/tools/business/vat-calculator-france/ 2026-10-20T14:30:56+05:30

Free France VAT calculator: add or remove 20% VAT in one click and see net, VAT and gross amounts. Reduced rates listed, bulk price lists.

https://buffermint.com/tools/business/vat-calculator-germany/ 2026-10-20T14:30:56+05:30

Free Germany VAT calculator: add or remove 19% VAT in one click and see net, VAT and gross amounts. Reduced rates listed, bulk price lists.

https://buffermint.com/tools/business/vat-calculator-ireland/ 2026-10-20T14:30:56+05:30

Free Ireland VAT calculator: add or remove 23% VAT in one click and see net, VAT and gross amounts. Reduced rates listed, bulk price lists.

https://buffermint.com/tools/business/self-employment-tax-calculator/ 2026-10-20T14:30:56+05:30

Self-employment tax calculator for 2026 and 2025: 15.3% on 92.35% of net profit, the Social Security wage base cap, Additional Medicare and the deductible half.

https://buffermint.com/tools/business/uk-salary-calculator/ 2026-10-20T14:30:56+05:30

UK salary calculator for 2026/27: take-home pay after income tax, National Insurance, pension and student loan, per year, month and week. Includes Scotland.

https://buffermint.com/tools/business/time-tracker/ 2026-10-20T14:30:56+05:30

Free online time tracker: start/stop timers per project and client, add time manually, set hourly rates and get weekly billable reports and CSV timesheets.

https://buffermint.com/tools/business/overtime-calculator/ 2026-10-20T14:30:56+05:30

Overtime calculator: weekly pay with time and a half over 40 hours, California daily overtime and double time, or your own rules. Per-day entry, yearly total.

https://buffermint.com/tools/business/receipt-scanner/ 2026-10-20T14:30:56+05:30

Free receipt scanner: turn receipt photos into an expense table with merchant, date, total and tax, then export CSV for Excel, QuickBooks or Xero.