diff --git a/internal/piwigo/files.go b/internal/piwigo/files.go
new file mode 100644
index 0000000..80ec9ae
--- /dev/null
+++ b/internal/piwigo/files.go
@@ -0,0 +1,64 @@
+package piwigo
+
+import (
+	"errors"
+	"fmt"
+	"net/url"
+	"os"
+)
+
+func (p *Piwigo) FileExists(md5 string) bool {
+	var resp map[string]*string
+
+	if err := p.Post("pwg.images.exist", &url.Values{
+		"md5sum_list": []string{md5},
+	}, &resp); err != nil {
+		return false
+	}
+
+	return resp[md5] != nil
+}
+
+func (p *Piwigo) UploadChunks(filename string) error {
+	md5, err := Md5File(filename)
+	if err != nil {
+		return err
+	}
+
+	if p.FileExists(md5) {
+		return errors.New("file already exists")
+	}
+
+	f, err := os.Open(filename)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	st, err := f.Stat()
+	if err != nil {
+		return err
+	}
+
+	nbChunks := st.Size()/CHUNK_SIZE + 1
+	for position := int64(0); position < nbChunks; position++ {
+		b64, err := Base64Chunk(f, int64(position))
+		if err != nil {
+			return err
+		}
+
+		err = p.Post("pwg.images.addChunk", &url.Values{
+			"original_sum": []string{md5},
+			"position":     []string{fmt.Sprint(position)},
+			"type":         []string{"file"},
+			"data":         []string{b64},
+		}, nil)
+		if err != nil {
+			return err
+		}
+		fmt.Printf("Upload %d/%d ok\n", position+1, nbChunks)
+	}
+	fmt.Println(md5)
+
+	return nil
+}
diff --git a/internal/piwigo/helper.go b/internal/piwigo/helper.go
index 94dda4d..94eaf69 100644
--- a/internal/piwigo/helper.go
+++ b/internal/piwigo/helper.go
@@ -1,13 +1,20 @@
 package piwigo
 
 import (
+	"crypto/md5"
+	"encoding/base64"
 	"encoding/json"
 	"errors"
 	"fmt"
+	"io"
+	"math"
 	"net/url"
+	"os"
 	"strings"
 )
 
+var CHUNK_SIZE int64 = int64(math.Pow(1024, 2))
+
 func DumpResponse(v interface{}) (err error) {
 	b, err := json.MarshalIndent(v, "", "  ")
 	if err == nil {
@@ -27,3 +34,28 @@ func ArgsToForm(args []string) (*url.Values, error) {
 	}
 	return params, nil
 }
+
+func Md5File(filename string) (string, error) {
+	file, err := os.Open(filename)
+	if err != nil {
+		return "", err
+	}
+	hash := md5.New()
+	_, err = io.Copy(hash, file)
+	if err != nil {
+		return "", err
+	}
+	return fmt.Sprintf("%x", hash.Sum(nil)), nil
+}
+
+func Base64Chunk(file *os.File, position int64) (string, error) {
+	b := make([]byte, CHUNK_SIZE)
+	n, err := file.ReadAt(b, position*CHUNK_SIZE)
+	if err != nil && err != io.EOF {
+		return "", err
+	}
+	if n == 0 {
+		return "", errors.New("position out of bound")
+	}
+	return base64.StdEncoding.EncodeToString(b[:n]), nil
+}
diff --git a/internal/piwigocli/images.go b/internal/piwigocli/images.go
index 5d07762..3b51009 100644
--- a/internal/piwigocli/images.go
+++ b/internal/piwigocli/images.go
@@ -2,6 +2,7 @@ package piwigocli
 
 type ImagesGroup struct {
 	Details ImagesDetailsCommand `command:"details" description:"Details of the images"`
+	Upload  ImagesUploadCommand  `command:"upload" description:"Upload of an images"`
 }
 
 var imagesGroup ImagesGroup
diff --git a/internal/piwigocli/images_upload.go b/internal/piwigocli/images_upload.go
new file mode 100644
index 0000000..c5df3ac
--- /dev/null
+++ b/internal/piwigocli/images_upload.go
@@ -0,0 +1,28 @@
+package piwigocli
+
+import (
+	"github.com/celogeek/piwigo-cli/internal/piwigo"
+)
+
+type ImagesUploadCommand struct {
+	Filename string `short:"f" long:"filename" description:"File to upload"`
+}
+
+func (c *ImagesUploadCommand) Execute(args []string) error {
+	p := piwigo.Piwigo{}
+	if err := p.LoadConfig(); err != nil {
+		return err
+	}
+
+	_, err := p.Login()
+	if err != nil {
+		return err
+	}
+
+	err = p.UploadChunks(c.Filename)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}