Free, privacy-first file conversion.
OkConverter is a focused set of 298 free, privacy-first file tools: converters, plus text, color and calculator utilities. Every one runs locally on your device — nothing is uploaded, stored, or logged. Fast, static, and built for the long haul.
Files never uploadedConversions run in your browserAlways free, no sign-up
Recently used
Image Converters31
View all →- TIFF to PNGPNG image
- TIFF to JPGJPG image
- PNG to JPGJPG image
- JPG to PNGPNG image
- WebP to PNGPNG image
- WebP to JPGJPG image
- PNG to WebPWebP image
- JPG to WebPWebP image
- Image to Resized imageResized image (same format)
- Image CompressorCompressed image (same format)
- AVIF to PNGPNG
- AVIF to JPGJPG
- HEIC to JPGJPG
- HEIC to PNGPNG
- HEIC to WebPWebP image
- AVIF to WebPWebP image
- BMP to PNGPNG image
- BMP to JPGJPG image
- JFIF to JPGJPG image
- Flip ImageFlipped image
- Rotate ImageRotated image
- Grayscale Image ConverterGrayscale image
- Image to Base64 ConverterBase64 text
- Base64 to Image ConverterImage
- Image to Cropped imageCropped image
- Image to Circle imagePNG (transparent)
- Image to Passport photoJPEG (300 DPI)
- Image to ASCII artText
- PNG to AVIFAVIF image
- JPG to AVIFAVIF image
- WebP to AVIFAVIF image
Audio & Video Converters56
View all →- MP4 to GIFGIF
- Video to MP3MP3
- MP3 to WAVWAV
- WAV to MP3MP3
- M4A to MP3MP3
- MOV to MP4MP4
- MKV to MP4MP4
- AVI to MP4MP4
- WebM to MP4MP4
- GIF to MP4MP4
- FLAC to MP3MP3
- OGG to MP3MP3
- AAC to MP3MP3
- WAV to OGGOGG
- MP3 to OGGOGG
- WAV to FLACFLAC
- MP3 to FLACFLAC
- WAV to M4AM4A
- MP3 to M4AM4A
- M4A to WAVWAV
- FLAC to WAVWAV
- OGG to WAVWAV
- AAC to WAVWAV
- Opus to MP3MP3
- WMA to MP3MP3
- MP4 to MP3MP3
- MP4 to WebMWebM
- MP4 to MOVMOV
- MP4 to MKVMKV
- MP4 to AVIAVI
- WebM to GIFGIF
- MOV to GIFGIF
- Audio TrimmerMP3
- Mute VideoMuted video
- MP3 CutterMP3
- Compress VideoMP4
- Trim VideoMP4
- Crop VideoMP4
- Rotate VideoMP4
- Resize VideoMP4
- Video Speed ChangerMP4
- Merge VideosMP4
- Loop VideoMP4
- Reverse VideoMP4
- Video to FramesZIP of PNG frames
- Merge AudioMP3
- Normalize AudioMP3
- Audio Volume ChangerMP3
- Audio Speed ChangerMP3
- MKV to WebMWebM
- MOV to WebMWebM
- WebM to MP3MP3
- MP4 to WAVWAV
- WAV to AACAAC
- FLAC to M4AM4A
- WAV to OpusOpus
PDF Converters26
View all →- JPG to PDFPDF
- PNG to PDFPDF
- WebP to PDFPDF
- GIF to PDFPDF
- PDF to JPGJPG or ZIP of JPGs
- PDF to PNGPNG or ZIP of PNGs
- Merge PDFMerged PDF
- Split PDFZIP of single-page PDFs
- Rotate PDFRotated PDF
- PDF to TextText
- Delete PDF PagesPDF
- Extract PDF PagesPDF
- Add Page Numbers to PDFPDF
- Watermark PDFPDF
- DOCX to MarkdownMarkdown file
- Markdown to PDFPDF file
- HTML to PDFPDF file
- PDF to Compressed PDFPDF file
- PDF to Cropped PDFPDF file
- PDF to Reordered PDFPDF file
- Redact PDFRedacted PDF
- Bates NumberingStamped PDF
- Remove PDF MetadataCleaned PDF
- Fill PDF FormFilled PDF
- PDF to ExcelExcel spreadsheet
- Bank Statement to CSVCSV file
GIF Converters10
View all →Data & Developer Converters25
View all →- CSV to JSONJSON file
- JSON to CSVCSV file
- CSV to SQLSQL script
- CSV to XMLXML file
- XML to CSVCSV file
- CSV to MarkdownMarkdown table
- TSV to CSVCSV file
- JSON to YAMLYAML file
- YAML to JSONJSON file
- CSV to ExcelExcel workbook (XLSX)
- Excel to CSVCSV file
- JSON to ExcelExcel workbook (XLSX)
- Excel to JSONJSON file
- XML to JSONJSON file
- JSON to XMLXML file
- CSV to TSVTSV file
- CSV to YAMLYAML file
- YAML to CSVCSV file
- TOML to JSONJSON file
- JSON to TOMLTOML file
- JSONL to CSVCSV file
- NDJSON to JSONJSON file
- SQL to CSVCSV file
- Excel to SQLSQL file
- Excel to MarkdownMarkdown file
Developer Tools41
View all →- Base64 EncoderBase64 text
- Base64 DecoderDecoded text
- URL EncoderURL-encoded text
- URL DecoderDecoded text
- JSON FormatterFormatted JSON
- JSON MinifierMinified JSON
- SHA-256 Hash GeneratorHex digest
- UUID GeneratorUUID list
- Unix Timestamp ConverterDate / timestamp breakdown
- QR Code GeneratorPNG image
- CSS MinifierCSS
- CSS BeautifierCSS
- JavaScript MinifierJavaScript
- JavaScript BeautifierJavaScript
- HTML MinifierHTML
- HTML BeautifierHTML
- SQL FormatterSQL
- JWT DecoderJSON
- HTML Entity EncoderText
- HTML Entity DecoderText
- Cron Expression ParserText
- Markdown PreviewHTML
- Regex TesterText
- MD5 Hash GeneratorHex digest
- SHA-1 Hash GeneratorHex digest
- SHA-512 Hash GeneratorHex digest
- JWT EncoderSigned token
- Crontab GeneratorCron expression
- JSON to TypeScriptTypeScript
- JSON to GoGo source
- JSON to PythonPython source
- cURL to FetchJavaScript
- Query String to JSONJSON
- ENV to JSONJSON
- HTML to MarkdownMarkdown
- Markdown to HTMLHTML
- Password GeneratorPassword list
- CSS Gradient GeneratorCSS
- Box Shadow GeneratorCSS
- Border Radius GeneratorCSS
- What Is This File?Format report
SVG Converters12
View all →- HEIC to SVGSVG (vector paths)
- AVIF to SVGSVG (vector paths)
- TIFF to SVGSVG (vector paths)
- BMP to SVGSVG (vector paths)
- GIF to SVGSVG (vector paths)
- WebP to SVGSVG (vector paths)
- JPG to SVGSVG (vector paths)
- PNG to SVGSVG (vector paths)
- SVG to PNGPNG image
- SVG to JPGJPG image
- SVG to PDFPDF document
- SVG to DXFDXF (CAD vector)
Icon Converters7
View all →Text Tools12
View all →Calculators23
View all →- Percentage CalculatorResult
- Age CalculatorResult
- Date Difference CalculatorResult
- BMI CalculatorResult
- Loan EMI CalculatorResult
- Tip CalculatorResult
- Discount CalculatorResult
- Hours CalculatorResult
- PX to REMREM value
- REM to PXPX value
- PX to EMEM value
- PT to PXPX value
- File Size ConverterFile size
- Aspect Ratio CalculatorRatio
- DPI CalculatorPrint size
- Mortgage CalculatorPayment breakdown
- Auto Loan CalculatorPayment breakdown
- Amortization ScheduleAmortization schedule
- Refinance CalculatorBreak-even analysis
- Hourly to SalaryPay breakdown
- Overtime CalculatorPay breakdown
- Debt Payoff PlannerPayoff schedule
- 401(k) CalculatorRetirement projection
Color Tools10
View all →Subtitle Converters7
View all →SEO Tools13
View all →- Robots.txt Generatorrobots.txt
- XML Sitemap GeneratorXML sitemap
- Meta Tag GeneratorHTML meta tags
- Open Graph GeneratorHTML meta tags
- Schema Markup GeneratorJSON-LD
- Hreflang GeneratorHreflang tags
- UTM BuilderCampaign URL
- SERP PreviewSnippet preview
- Keyword Density CheckerDensity report
- Htaccess Redirect GeneratorApache rules
- Nginx Redirect GeneratorNginx config
- Ads.txt Generatorads.txt
- OG Image GeneratorPNG image
Network & Server Tools19
View all →- CIDR CalculatorNetwork details
- Subnet CalculatorSubnet details
- IP Address ConverterIP notations
- SPF Record GeneratorDNS TXT record
- DMARC Record GeneratorDNS TXT record
- Bcrypt GeneratorBcrypt hash
- Htpasswd GeneratorHtpasswd line
- User Agent ParserParsed details
- MIME Type LookupMIME types
- HTTP Status CodesStatus details
- DNS LookupDNS report
- SSL Certificate CheckerCertificate report
- SPF CheckerSPF report
- DMARC CheckerDMARC report
- MX CheckerMX report
- HTTP Header InspectorHeader report
- WHOIS LookupRegistration report
- Currency ConverterConverted amount
- Time Zone Meeting PlannerMeeting times
Document Generators6
View all →Guides14
View all →- 10 Things You Can Do With a PDF (Without Installing Software)Merge, split, rotate, watermark, and extract text from a PDF — all directly in your browser, no software install or account required.
- APNG vs GIF: The Better Animated Image FormatWhy APNG beats GIF for animated images — true color, real transparency — and where GIF still wins.
- CSV vs Excel: Which Format Should You Use?The real differences between CSV and Excel (.xlsx) files — formatting, formulas, multiple sheets — and which one to pick for your data.
- CSV, JSON, and YAML: When to Use EachThe practical differences between CSV, JSON, and YAML — and which format actually fits your data, config, or API.
- Favicon Sizes: The Complete GuideEvery favicon size you actually need in 2026 — ICO, PNG, and apple-touch-icon — and why a single 16×16 icon isn't enough anymore.
- HEIC vs JPG: Why Your iPhone Photos Won't Open EverywhereWhy iPhone photos save as .heic, what makes the format different from JPG, and when you actually need to convert.
- How to Reduce Image File Size (Without Losing Quality)Practical ways to shrink an image's file size — format choice, quality settings, and resizing — without a visible quality hit.
- Regular Expressions: A Beginner's GuideThe regex building blocks that cover most real-world pattern matching — character classes, quantifiers, groups — explained plainly.
- SVG to DXF for Laser Cutting and CNCExport settings for turning SVG artwork into DXF files a laser or CNC router will actually cut — units, paths, text, curves, and what to check before you cut.
- SVG vs PNG: Which Should You Use?SVG and PNG solve different problems — vector vs. raster, infinite scaling vs. photographic detail. Here's how to choose.
- WCAG Contrast Ratios ExplainedWhat WCAG contrast ratios mean, the AA/AAA thresholds for normal and large text, and how to actually meet them.
- What Is a JWT?What a JSON Web Token actually contains, how signature verification works, and why you should never store sensitive data in one.
- What Is an ICO File?What an ICO file actually is, how it differs from a plain PNG, and when you genuinely need one instead of just using an image.
- Why Your DXF Imports at the Wrong SizeWhy DXF files import at the wrong size (unitless scale), how to diagnose $INSUNITS in a text editor, and how to fix it — 100% free.