Online file tools
144 free tools: PDF processing, image conversion & compression, developer utilities, SEO and security. No signup, files auto-deleted after 1 hour.
PDF20 tools
Merge PDF
Combine multiple PDF files into one, keeping the original quality.
Split PDF
Extract selected pages, or split each page into a separate file.
Compress PDF
Reduce PDF size by optimizing the embedded images.
Rotate PDF
Rotate all pages by 90/180/270 degrees.
Delete PDF Pages
Remove unwanted pages from a PDF file.
Extract PDF Pages
Pull selected pages into a new PDF.
Rearrange PDF Pages
Reorder pages according to the list you enter.
Watermark PDF
Add a faint diagonal text watermark to every page.
Protect PDF
Encrypt a PDF with AES — a password is required to open it.
Unlock PDF
Remove the password from your PDF (you must know the current one).
Flatten PDF
Bake forms and annotations into static, non-editable content.
Fill PDF Form
Fill the AcroForm fields of a PDF.
OCR PDF
Recognize text in scanned PDFs → searchable & copyable PDF.
PDF to Word
Convert a PDF into an editable DOCX file.
PDF to Excel
Extract tables from a PDF into Excel (one sheet per table).
PDF to PowerPoint
Each PDF page becomes a slide (as a high-quality image).
PDF to Image
Export each PDF page as a PNG image.
PDF to Text
Extract all text from a PDF into a .txt file.
PDF to HTML
Convert PDF content into an HTML page.
JPG to PDF
Combine images (JPG, PNG, WEBP...) into one PDF, one image per page.
Image13 tools
Convert Image
PNG ⇄ JPG ⇄ WEBP — processed in your browser, images never leave your device.
Resize Image
Resize by pixels or percentage — processed in your browser.
Compress Image
Reduce JPG/WEBP size with a quality slider — in your browser.
HEIC to JPG
Convert iPhone photos (HEIC/HEIF) to JPG or PNG.
Crop Image
Crop by ratio 1:1, 16:9, 4:3 or a custom area.
Rotate Image
Rotate an image by any angle.
Flip Image
Flip an image horizontally or vertically.
Grayscale Image
Convert a color image to black & white.
Adjust Brightness / Contrast / Saturation
Adjust brightness, contrast and saturation (100 = unchanged).
Blur Image
Apply Gaussian blur with a custom radius.
Sharpen Image
Increase sharpness with an Unsharp Mask.
Watermark Image
Add a text watermark to a corner of the image.
Remove Background (AI)
Automatically cut the subject from the background, export a transparent PNG.
Office11 tools
Word to PDF
Convert DOC/DOCX to PDF, preserving the layout.
Excel to PDF
Convert XLS/XLSX spreadsheets to PDF.
PowerPoint to PDF
Convert PPT/PPTX slides to PDF.
Word to HTML
Convert DOCX into clean, semantic HTML.
HTML to Word
Convert an HTML page into an editable DOCX.
Excel to CSV
Export each Excel sheet to CSV (opens cleanly, no font issues).
CSV to Excel
Convert a CSV file into an XLSX spreadsheet.
CSV to JSON
Convert CSV data into a JSON array.
JSON to CSV
Convert a JSON array into a CSV table.
XML to Excel
Convert tabular XML data into an Excel file.
Excel to XML
Export an Excel spreadsheet to XML.
Markdown7 tools
MarkItDown
Convert PDF, Word, Excel, PowerPoint, HTML... into clean Markdown.
HTML to Markdown
Convert an HTML page into tidy Markdown.
Markdown to HTML
Render a Markdown file into a complete HTML page.
Markdown to PDF
Export Markdown to a clean PDF.
Markdown to Word
Convert Markdown into a DOCX file.
Markdown to EPUB
Package Markdown into an EPUB ebook.
Markdown to PowerPoint
Each heading becomes a slide.
Ebook4 tools
Text12 tools
Word Counter
Count words, characters, sentences and paragraphs.
Character Counter
Count characters with/without spaces, fits Twitter/SEO limits.
Reading Time
Estimate reading time (~200 words/minute).
Remove Duplicate Lines
Remove repeated lines, keeping the first occurrence.
Sort Lines
Sort lines alphabetically, ascending or descending.
Reverse Lines
Reverse the order of lines.
Remove Empty Lines
Drop blank or whitespace-only lines.
Find & Replace
Find and replace text, with regex support.
Case Converter
UPPERCASE, lowercase, camelCase, snake_case, kebab-case, PascalCase...
Slug Generator
Turn an accented title into a clean URL slug.
Unicode Converter
Convert text ⇄ \uXXXX escapes.
Lorem Ipsum
Generate Lorem Ipsum placeholder text by paragraphs/sentences/words.
Developer29 tools
Base64 Encode
Encode text (UTF-8) to Base64.
Base64 Decode
Decode Base64 back to UTF-8 text.
URL Encode
Encode a string for safe use in a URL.
URL Decode
Decode a URL-encoded string.
HTML Encode
Escape special characters into HTML entities.
HTML Decode
Convert HTML entities back to characters.
JWT Decode
Decode a JWT header and payload (no signature check).
JSON Formatter
Pretty-print JSON with indentation.
JSON Minify
Minify JSON to a single line.
JSON Validate
Check whether JSON is valid and report the error.
XML Beautify
Pretty-print XML with indentation.
XML Minify
Minify XML, removing whitespace between tags.
XML Validate
Check XML syntax.
HTML Formatter
Reformat HTML with indentation.
HTML Minify
Minify HTML, stripping whitespace and comments.
Curl Generator
Build a curl command from method, URL, headers and body.
Cron Expression
Build a cron expression.
UUID Generator
Generate random UUID v4, any count.
Explain Cron
Explain a cron expression in plain language.
YAML ⇄ JSON
Convert between YAML and JSON.
SQL Formatter
Format or minify SQL statements.
Regex Tester
Test regular expressions live on sample text.
Text Diff
Compare two texts and highlight line differences.
JSON Diff
Compare two JSON documents and find the differences.
Unix Timestamp ⇄ Date
Convert Unix timestamps and dates (Vietnam timezone).
HTML Preview
Preview HTML rendered live in your browser.
Image ↔ Base64
Convert an image to a Base64 string (Data URI) and back — runs 100% in your browser.
Character Inspector (Unicode)
Inspect each character: Unicode code point, UTF-8, hidden/invisible characters, combining marks and NFC normalization.
Punycode Converter (IDN)
Convert Vietnamese/Unicode domain names to Punycode (xn--) and back — runs in your browser.
SEO8 tools
Meta Tag Generator
Generate title, description and keyword meta tags for SEO.
Open Graph Generator
Generate Open Graph tags for Facebook/Zalo.
Twitter Card Generator
Generate Twitter Card tags for X/Twitter.
Robots.txt Generator
Generate a basic robots.txt file.
Keyword Density
Analyze keyword density in your content.
.htaccess Generator
Generate an .htaccess file: force HTTPS, add/remove www, 301/302 redirects, error pages — runs in your browser.
Open Graph Checker
Read a URL's Open Graph / Twitter Card tags, score them and suggest missing tags.
Page Link Analyzer
Scan all links on a page: internal/external, nofollow — for SEO audits.
QR & Barcode3 tools
Security15 tools
IOC Extractor
Extract IPs, domains, URLs, hashes, emails and CVEs from logs/text.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512, bcrypt from text.
Password Generator
Generate strong random passwords with length/character options.
Password Strength
Rate password strength and estimated crack time.
CVSS Calculator
Compute a CVSS 3.1 Base Score from the metrics.
File Hash
Compute MD5/SHA-1/SHA-256/SHA-512 of a file (no upload).
JWT Verify
Verify a JWT signature (HS256/384/512) with a secret.
SSL Certificate Checker
Check a domain's SSL certificate: expiry, issuer, SANs, fingerprint.
SSL Certificate Decoder
Paste a PEM certificate to view subject, issuer, validity, SANs, fingerprint.
CSR Decoder
Paste a CSR (PEM) to view its subject, SANs and key info.
CSR Generator
Generate a private key + CSR from your organization details to request an SSL certificate.
Digital Signature Checker
Read the digital signatures in a signed file (PDF/document) — signer and certificate info.
CVE Lookup
Look up CVE vulnerability details from the NVD (NIST) database.
Malware Scan
Check a file via VirusTotal by hash (the file never leaves your device).
SSL Certificate Matcher
Check whether a certificate, private key and CSR match (compares the SHA-256 of their public keys).
Network9 tools
Ping Checker
Check whether a host responds and measure connection latency.
IP Blacklist Checker
Check whether an IP address is on anti-spam blacklists (RBL/DNSBL).
Traceroute
Trace the network hops from the server to a domain or IP.
HTTP Header Checker
Inspect a URL's HTTP response headers and evaluate its security headers.
ASN Lookup
Look up the autonomous system number (ASN), network operator and IP prefix of an IP address.
MAC Address Lookup
Look up a device manufacturer from a MAC address (OUI).
Bulk Domain/IP Checker
Bulk DNS resolution: paste a list of domains to get their IP addresses.
Subnet Calculator (CIDR)
Compute network, broadcast, host range, usable hosts and wildcard from a CIDR — runs in your browser.
IP Location Lookup
Look up the country, city, ISP, ASN and coordinates of an IP address.
Utilities4 tools
Lunar Calendar (Vietnamese)
Convert between solar and Vietnamese lunar dates: sexagenary cycle, solar terms, auspicious hours — runs in your browser.
Date Calculator
Compute the number of days between two dates, or add/subtract days from a given date.
Social Username Checker
Quickly generate profile links across 16 platforms (Facebook, Instagram, GitHub…) from a username.
Shrink Image
Reduce JPG/PNG/WebP image size to your target — runs 100% in your browser.